commit e223458dd4092de282e58c7dfafb35412028f854
Author: SourceFellows <info@source-fellows.com>
Date:   Fri Aug 21 06:26:40 2020 +0200

    initial import

diff --git a/best-practices/context-http-server/main.go b/best-practices/context-http-server/main.go
new file mode 100644
index 0000000..9dc5b8a
--- /dev/null
+++ b/best-practices/context-http-server/main.go
@@ -0,0 +1,24 @@
+package main
+
+import (
+	"fmt"
+	"net/http"
+	"time"
+)
+
+func handleCall(res http.ResponseWriter, req *http.Request) {
+	ctx := req.Context()
+	select {
+	case <-ctx.Done():
+		res.Write([]byte("end"))
+		fmt.Println("clsoing connection to client")
+		return
+	case <-time.After(20 * time.Second):
+		fmt.Fprintln(res, "Hello World")
+	}
+}
+
+func main() {
+	http.HandleFunc("/", handleCall)
+	http.ListenAndServe(":8080", nil)
+}
diff --git a/best-practices/context-loop/main.go b/best-practices/context-loop/main.go
new file mode 100644
index 0000000..c02de42
--- /dev/null
+++ b/best-practices/context-loop/main.go
@@ -0,0 +1,41 @@
+package main
+
+import (
+	"context"
+	"log"
+	"time"
+)
+
+func loop(ctx context.Context) <-chan string {
+	c := make(chan string)
+	go func() {
+		for {
+			select {
+			case <-ctx.Done():
+				close(c)
+				return
+			default:
+				c <- "Hello World!"
+			}
+			time.Sleep(1 * time.Second)
+		}
+	}()
+	return c
+}
+
+func main() {
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+	for s := range loop(ctx) {
+		log.Println(s)
+	}
+
+	log.Println("nächste Variante")
+
+	ctx, cancel = context.WithCancel(context.Background())
+	time.AfterFunc(5*time.Second, cancel)
+	for s := range loop(ctx) {
+		log.Println(s)
+	}
+
+}
diff --git a/best-practices/context-value-nono/main.go b/best-practices/context-value-nono/main.go
new file mode 100644
index 0000000..4fb1f38
--- /dev/null
+++ b/best-practices/context-value-nono/main.go
@@ -0,0 +1,28 @@
+package main
+
+import (
+	"context"
+	"fmt"
+)
+
+type contextKey int
+
+const usernameKey contextKey = iota
+
+func businessCall(username string) {
+	//.. was wichtiges
+	fmt.Println(username)
+}
+
+func main() {
+	ctx := context.Background()
+	vCtx := context.WithValue(ctx, usernameKey, "bob")
+	//.. einiges anderes
+	businessCall(vCtx.Value(usernameKey).(string))
+
+	//Variante2
+	username := "bob"
+	//.. einiges anderes
+	businessCall(username)
+
+}
diff --git a/best-practices/context-value/main.go b/best-practices/context-value/main.go
new file mode 100644
index 0000000..1e01775
--- /dev/null
+++ b/best-practices/context-value/main.go
@@ -0,0 +1,15 @@
+package main
+
+import (
+	"context"
+	"fmt"
+)
+
+type contextKey string
+
+func main() {
+	var key contextKey = "test"
+	ctx := context.Background()
+	ctx = context.WithValue(ctx, key, "world")
+	fmt.Println(ctx.Value(key))
+}
diff --git a/best-practices/context/main.go b/best-practices/context/main.go
new file mode 100644
index 0000000..994cdec
--- /dev/null
+++ b/best-practices/context/main.go
@@ -0,0 +1,28 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"time"
+)
+
+func main() {
+
+	bg := context.Background()
+	fmt.Println(bg.Deadline()) //0001-01-01 00:00:00 +0000 UTC false
+	fmt.Println(bg.Err())      //<nil>
+	//fmt.Println(<-td.Done())   //blockiert für immer!
+
+	ctx, cancel := context.WithTimeout(bg, 5*time.Second)
+	defer cancel()
+
+	go func() {
+		time.Sleep(500 * time.Millisecond)
+		cancel()
+	}()
+
+	fmt.Println(ctx.Deadline())
+	<-ctx.Done()
+	fmt.Println("Ende")
+
+}
diff --git a/best-practices/empty-string-check/main.go b/best-practices/empty-string-check/main.go
new file mode 100644
index 0000000..39e4c92
--- /dev/null
+++ b/best-practices/empty-string-check/main.go
@@ -0,0 +1,17 @@
+package main
+
+import "fmt"
+
+func main() {
+
+	s := ""
+
+	if len(s) == 0 {
+		fmt.Println("string ist leer")
+	}
+
+	if s == "" {
+		fmt.Println("string ist leer")
+	}
+
+}
diff --git a/best-practices/error-behaviour/external_lib.go b/best-practices/error-behaviour/external_lib.go
new file mode 100644
index 0000000..2dd4a93
--- /dev/null
+++ b/best-practices/error-behaviour/external_lib.go
@@ -0,0 +1,12 @@
+package main
+
+import (
+	"net"
+)
+
+func callRemoteService() error {
+
+	var err net.UnknownNetworkError = "blub"
+	return err
+
+}
diff --git a/best-practices/error-behaviour/main.go b/best-practices/error-behaviour/main.go
new file mode 100644
index 0000000..753bd75
--- /dev/null
+++ b/best-practices/error-behaviour/main.go
@@ -0,0 +1,34 @@
+package main
+
+import (
+	"log"
+	"net"
+)
+
+func isTimeout(err error) bool {
+
+	type timeout interface {
+		Timeout() bool
+	}
+
+	v, ok := err.(timeout)
+	if !ok {
+		return false
+	}
+
+	return v.Timeout()
+
+}
+
+func main() {
+	err := callRemoteService()
+
+	if nerr, ok := err.(net.Error); ok && nerr.Timeout() {
+		//nochmal versuchen
+		log.Printf("it's a unknown network error: %v\n", nerr)
+	}
+
+	if err != nil && !isTimeout(err) {
+		log.Fatal(err)
+	}
+}
diff --git a/best-practices/error-handling-2/main.go b/best-practices/error-handling-2/main.go
new file mode 100644
index 0000000..31786ef
--- /dev/null
+++ b/best-practices/error-handling-2/main.go
@@ -0,0 +1,31 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+)
+
+var err error
+var f *os.File
+
+func write(text string) {
+	if err != nil {
+		return
+	}
+	_, err = fmt.Fprintln(f, text)
+}
+
+func main() {
+	f, err = os.OpenFile("test.txt", os.O_WRONLY, os.ModePerm)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer f.Close()
+	write("Hello world 2")
+	write("Hello world 2")
+	if err != nil {
+		log.Fatal(err)
+	}
+	fmt.Println(f)
+}
diff --git a/best-practices/error-handling-2/test.txt b/best-practices/error-handling-2/test.txt
new file mode 100644
index 0000000..172b2b6
--- /dev/null
+++ b/best-practices/error-handling-2/test.txt
@@ -0,0 +1,2 @@
+Hello world 2
+Hello world 2
diff --git a/best-practices/error-handling-3/main.go b/best-practices/error-handling-3/main.go
new file mode 100644
index 0000000..ccc916c
--- /dev/null
+++ b/best-practices/error-handling-3/main.go
@@ -0,0 +1,48 @@
+package main
+
+import (
+	"fmt"
+	"io"
+	"log"
+	"os"
+)
+
+func NewWriter(w io.Writer) *writer {
+	return &writer{w, nil}
+}
+
+type writer struct {
+	w   io.Writer
+	err error
+}
+
+func (w *writer) write(text string) {
+	if w.err != nil {
+		return
+	}
+	_, w.err = fmt.Fprintln(w.w, text)
+}
+
+func (w *writer) Err() error {
+	return w.err
+}
+
+func main() {
+
+	f, err := os.OpenFile("test.txt", os.O_WRONLY, os.ModePerm)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer f.Close()
+
+	w := NewWriter(f)
+
+	w.write("Hello world 3")
+	w.write("Hello world 3")
+
+	if err = w.Err(); err != nil {
+		log.Fatal(err)
+	}
+	fmt.Println(f)
+
+}
diff --git a/best-practices/error-handling-3/test.txt b/best-practices/error-handling-3/test.txt
new file mode 100644
index 0000000..dbc8893
--- /dev/null
+++ b/best-practices/error-handling-3/test.txt
@@ -0,0 +1,2 @@
+Hello world 3
+Hello world 3
diff --git a/best-practices/error-handling/main.go b/best-practices/error-handling/main.go
new file mode 100644
index 0000000..05ea06c
--- /dev/null
+++ b/best-practices/error-handling/main.go
@@ -0,0 +1,24 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+)
+
+func main() {
+	f, err := os.OpenFile("test.txt", os.O_WRONLY, os.ModePerm)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer f.Close()
+	_, err = fmt.Fprintln(f, "Hello World")
+	if err != nil {
+		log.Fatal(err)
+	}
+	_, err = fmt.Fprintln(f, "Hello World")
+	if err != nil {
+		log.Fatal(err)
+	}
+	fmt.Println(f)
+}
diff --git a/best-practices/error-handling/test.txt b/best-practices/error-handling/test.txt
new file mode 100644
index 0000000..b3eee0a
--- /dev/null
+++ b/best-practices/error-handling/test.txt
@@ -0,0 +1,4 @@
+Hello World
+Hello World
+Hello World
+Hello World
diff --git a/best-practices/file-io-large/main.go b/best-practices/file-io-large/main.go
new file mode 100644
index 0000000..e80ee13
--- /dev/null
+++ b/best-practices/file-io-large/main.go
@@ -0,0 +1,24 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"log"
+	"os"
+)
+
+func main() {
+
+	f, err := os.Open("main.go")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer f.Close()
+
+	scanner := bufio.NewScanner(f)
+	//scanner.Split(bufio.ScanWords)
+	for scanner.Scan() {
+		fmt.Println(scanner.Text())
+	}
+
+}
diff --git a/best-practices/file-io/main.go b/best-practices/file-io/main.go
new file mode 100644
index 0000000..0e7ba40
--- /dev/null
+++ b/best-practices/file-io/main.go
@@ -0,0 +1,24 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"log"
+)
+
+func main() {
+
+	bites, err := ioutil.ReadFile("test.txt")
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	fmt.Printf("%s\n", bites)
+	fmt.Println(string(bites))
+
+	toWrite := []byte("Hello World!")
+	err = ioutil.WriteFile("test2.txt", toWrite, 0644)
+	if err != nil {
+		log.Fatal(err)
+	}
+}
diff --git a/best-practices/file-io/test.txt b/best-practices/file-io/test.txt
new file mode 100644
index 0000000..c57eff5
--- /dev/null
+++ b/best-practices/file-io/test.txt
@@ -0,0 +1 @@
+Hello World!
\ No newline at end of file
diff --git a/best-practices/force-interface/main.go b/best-practices/force-interface/main.go
new file mode 100644
index 0000000..da48d86
--- /dev/null
+++ b/best-practices/force-interface/main.go
@@ -0,0 +1,18 @@
+package main
+
+type UserService interface {
+	Save()
+}
+
+var _ UserService = &MyUserService{}
+
+type MyUserService struct {
+}
+
+func (us *MyUserService) Save() {
+
+}
+
+func main() {
+
+}
diff --git a/best-practices/goroutine-pooling/main.go b/best-practices/goroutine-pooling/main.go
new file mode 100644
index 0000000..f3849b8
--- /dev/null
+++ b/best-practices/goroutine-pooling/main.go
@@ -0,0 +1,33 @@
+package main
+
+import (
+	"fmt"
+	"sync"
+	"time"
+)
+
+var (
+	concurrent = 5
+	pool       = make(chan interface{}, concurrent)
+)
+
+func work(num int, w *sync.WaitGroup) {
+	pool <- "starting"
+	defer func() {
+		w.Done()
+		<-pool
+	}()
+	fmt.Printf("number %d\n", num)
+	time.Sleep(1 * time.Second)
+}
+
+func main() {
+
+	var wg sync.WaitGroup
+	for i := 0; i < 1000; i++ {
+		wg.Add(1)
+		go work(i, &wg)
+	}
+	wg.Wait()
+
+}
diff --git a/best-practices/logging-defer/main.go b/best-practices/logging-defer/main.go
new file mode 100644
index 0000000..d5441a0
--- /dev/null
+++ b/best-practices/logging-defer/main.go
@@ -0,0 +1,15 @@
+package main
+
+import "log"
+
+func importantStuff() {
+	log.Println("rein")
+	defer log.Println("raus")
+
+	log.Println("drin")
+
+}
+
+func main() {
+	importantStuff()
+}
diff --git a/best-practices/map-contains/main.go b/best-practices/map-contains/main.go
new file mode 100644
index 0000000..20b6ae3
--- /dev/null
+++ b/best-practices/map-contains/main.go
@@ -0,0 +1,14 @@
+package main
+
+import "fmt"
+
+func main() {
+
+	m := make(map[string]string)
+	m["key1"] = "value1"
+
+	if v, ok := m["key2"]; ok {
+		fmt.Printf("Wert %v enthalten\n", v)
+	}
+
+}
diff --git a/best-practices/project-structure/cmd-sample/cmd/myapp/myapp.go b/best-practices/project-structure/cmd-sample/cmd/myapp/myapp.go
new file mode 100644
index 0000000..a9e8afa
--- /dev/null
+++ b/best-practices/project-structure/cmd-sample/cmd/myapp/myapp.go
@@ -0,0 +1,7 @@
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Println("myapp")
+}
diff --git a/best-practices/project-structure/cmd-sample/cmd/mycli/mycli.go b/best-practices/project-structure/cmd-sample/cmd/mycli/mycli.go
new file mode 100644
index 0000000..993680a
--- /dev/null
+++ b/best-practices/project-structure/cmd-sample/cmd/mycli/mycli.go
@@ -0,0 +1,7 @@
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Println("mycli")
+}
diff --git a/best-practices/project-structure/cmd-sample/handler.go b/best-practices/project-structure/cmd-sample/handler.go
new file mode 100644
index 0000000..e69de29
diff --git a/best-practices/project-structure/cmd-sample/myapp b/best-practices/project-structure/cmd-sample/myapp
new file mode 100755
index 0000000..ce8baff
Binary files /dev/null and b/best-practices/project-structure/cmd-sample/myapp differ
diff --git a/best-practices/project-structure/cmd-sample/registration.go b/best-practices/project-structure/cmd-sample/registration.go
new file mode 100644
index 0000000..e69de29
diff --git a/best-practices/project-structure/cmd-sample/service.go b/best-practices/project-structure/cmd-sample/service.go
new file mode 100644
index 0000000..e69de29
diff --git a/best-practices/project-structure/dependency-sample/cmd/main.go b/best-practices/project-structure/dependency-sample/cmd/main.go
new file mode 100644
index 0000000..9dd33e9
--- /dev/null
+++ b/best-practices/project-structure/dependency-sample/cmd/main.go
@@ -0,0 +1,17 @@
+package main
+
+import (
+	"net/http"
+
+	"golang.source-fellows.com/samples/applicationx/http/rest"
+	"golang.source-fellows.com/samples/applicationx/postgres"
+)
+
+func main() {
+
+	us := &postgres.UserService{}
+
+	http.HandleFunc("/", rest.Handler(us))
+	http.ListenAndServe(":8080", nil)
+
+}
diff --git a/best-practices/project-structure/dependency-sample/go.mod b/best-practices/project-structure/dependency-sample/go.mod
new file mode 100644
index 0000000..7176e01
--- /dev/null
+++ b/best-practices/project-structure/dependency-sample/go.mod
@@ -0,0 +1,8 @@
+module golang.source-fellows.com/samples/applicationx
+
+go 1.14
+
+require (
+	github.com/golang/mock v1.4.4
+	rsc.io/quote/v3 v3.1.0 // indirect
+)
diff --git a/best-practices/project-structure/dependency-sample/go.sum b/best-practices/project-structure/dependency-sample/go.sum
new file mode 100644
index 0000000..e88613b
--- /dev/null
+++ b/best-practices/project-structure/dependency-sample/go.sum
@@ -0,0 +1,14 @@
+github.com/golang/mock v1.4.3 h1:GV+pQPG/EUUbkh47niozDcADz6go/dUwhVzdUQHIVRw=
+github.com/golang/mock v1.4.3/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt3cw=
+github.com/golang/mock v1.4.4 h1:l75CXGRSwbaYNpl/Z2X1XIIAMSCquvXgpVZDhwEIJsc=
+github.com/golang/mock v1.4.4/go.mod h1:l3mdAwkq5BuhzHwde/uurv3sEJeZMXNpwsxVWU71h+4=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/tools v0.0.0-20190425150028-36563e24a262 h1:qsl9y/CJx34tuA7QCPNp86JNJe4spst6Ff8MjvPUdPg=
+golang.org/x/tools v0.0.0-20190425150028-36563e24a262/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
+rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
+rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
diff --git a/best-practices/project-structure/dependency-sample/http/rest/handler.go b/best-practices/project-structure/dependency-sample/http/rest/handler.go
new file mode 100644
index 0000000..2f20a61
--- /dev/null
+++ b/best-practices/project-structure/dependency-sample/http/rest/handler.go
@@ -0,0 +1,16 @@
+package rest
+
+import (
+	"fmt"
+	"net/http"
+	"time"
+
+	"golang.source-fellows.com/samples/applicationx"
+)
+
+func Handler(us applicationx.UserService) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		us.CreateUser(&applicationx.User{})
+		fmt.Fprintf(w, "Hello World! %s", time.Now())
+	}
+}
diff --git a/best-practices/project-structure/dependency-sample/http/rest/handler_test.go b/best-practices/project-structure/dependency-sample/http/rest/handler_test.go
new file mode 100644
index 0000000..7666997
--- /dev/null
+++ b/best-practices/project-structure/dependency-sample/http/rest/handler_test.go
@@ -0,0 +1,29 @@
+package rest
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/golang/mock/gomock"
+	"golang.source-fellows.com/samples/applicationx/mocks"
+)
+
+func TestHandler(t *testing.T) {
+
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+
+	userService := mocks.NewMockUserService(ctrl)
+
+	handlerFunc := Handler(userService)
+
+	w := httptest.NewRecorder()
+	r, _ := http.NewRequest("GET", "/egal", nil)
+
+	//wird der Service überhaupt aufgerufen?
+	userService.EXPECT().CreateUser(gomock.Any()).MinTimes(1)
+
+	handlerFunc(w, r)
+
+}
diff --git a/best-practices/project-structure/dependency-sample/mocks/user_service.go b/best-practices/project-structure/dependency-sample/mocks/user_service.go
new file mode 100644
index 0000000..e34ab45
--- /dev/null
+++ b/best-practices/project-structure/dependency-sample/mocks/user_service.go
@@ -0,0 +1,77 @@
+// Code generated by MockGen. DO NOT EDIT.
+// Source: user.go
+
+// Package mocks is a generated GoMock package.
+package mocks
+
+import (
+	gomock "github.com/golang/mock/gomock"
+	applicationx "golang.source-fellows.com/samples/applicationx"
+	reflect "reflect"
+)
+
+// MockUserService is a mock of UserService interface
+type MockUserService struct {
+	ctrl     *gomock.Controller
+	recorder *MockUserServiceMockRecorder
+}
+
+// MockUserServiceMockRecorder is the mock recorder for MockUserService
+type MockUserServiceMockRecorder struct {
+	mock *MockUserService
+}
+
+// NewMockUserService creates a new mock instance
+func NewMockUserService(ctrl *gomock.Controller) *MockUserService {
+	mock := &MockUserService{ctrl: ctrl}
+	mock.recorder = &MockUserServiceMockRecorder{mock}
+	return mock
+}
+
+// EXPECT returns an object that allows the caller to indicate expected use
+func (m *MockUserService) EXPECT() *MockUserServiceMockRecorder {
+	return m.recorder
+}
+
+// CreateUser mocks base method
+func (m *MockUserService) CreateUser(u *applicationx.User) error {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "CreateUser", u)
+	ret0, _ := ret[0].(error)
+	return ret0
+}
+
+// CreateUser indicates an expected call of CreateUser
+func (mr *MockUserServiceMockRecorder) CreateUser(u interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "CreateUser", reflect.TypeOf((*MockUserService)(nil).CreateUser), u)
+}
+
+// ReadUser mocks base method
+func (m *MockUserService) ReadUser(id int) (*applicationx.User, error) {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "ReadUser", id)
+	ret0, _ := ret[0].(*applicationx.User)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// ReadUser indicates an expected call of ReadUser
+func (mr *MockUserServiceMockRecorder) ReadUser(id interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "ReadUser", reflect.TypeOf((*MockUserService)(nil).ReadUser), id)
+}
+
+// DeleteUser mocks base method
+func (m *MockUserService) DeleteUser(id int) error {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "DeleteUser", id)
+	ret0, _ := ret[0].(error)
+	return ret0
+}
+
+// DeleteUser indicates an expected call of DeleteUser
+func (mr *MockUserServiceMockRecorder) DeleteUser(id interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "DeleteUser", reflect.TypeOf((*MockUserService)(nil).DeleteUser), id)
+}
diff --git a/best-practices/project-structure/dependency-sample/postgres/user_service.go b/best-practices/project-structure/dependency-sample/postgres/user_service.go
new file mode 100644
index 0000000..fa36fd1
--- /dev/null
+++ b/best-practices/project-structure/dependency-sample/postgres/user_service.go
@@ -0,0 +1,24 @@
+package postgres
+
+import (
+	"fmt"
+
+	"golang.source-fellows.com/samples/applicationx"
+)
+
+var _ applicationx.UserService = &UserService{}
+
+type UserService struct{}
+
+func (us *UserService) CreateUser(user *applicationx.User) error {
+	fmt.Println("Create User in Postgres Service")
+	return nil
+}
+
+func (us *UserService) DeleteUser(id int) error {
+	return nil
+}
+
+func (us *UserService) ReadUser(id int) (*applicationx.User, error) {
+	return nil, nil
+}
diff --git a/best-practices/project-structure/dependency-sample/user.go b/best-practices/project-structure/dependency-sample/user.go
new file mode 100644
index 0000000..29330e0
--- /dev/null
+++ b/best-practices/project-structure/dependency-sample/user.go
@@ -0,0 +1,14 @@
+//go:generate mockgen -source=user.go -package mocks -destination mocks/user_service.go
+
+package applicationx
+
+type User struct {
+	ID   int
+	name string
+}
+
+type UserService interface {
+	CreateUser(u *User) error
+	ReadUser(id int) (*User, error)
+	DeleteUser(id int) error
+}
diff --git a/best-practices/project-structure/flat-sample/handler.go b/best-practices/project-structure/flat-sample/handler.go
new file mode 100644
index 0000000..e69de29
diff --git a/best-practices/project-structure/flat-sample/main.go b/best-practices/project-structure/flat-sample/main.go
new file mode 100644
index 0000000..e69de29
diff --git a/best-practices/project-structure/flat-sample/registration.go b/best-practices/project-structure/flat-sample/registration.go
new file mode 100644
index 0000000..e69de29
diff --git a/best-practices/project-structure/flat-sample/service.go b/best-practices/project-structure/flat-sample/service.go
new file mode 100644
index 0000000..e69de29
diff --git a/best-practices/project-structure/internal-sample/a/b/c/g/app.go b/best-practices/project-structure/internal-sample/a/b/c/g/app.go
new file mode 100644
index 0000000..e69de29
diff --git a/best-practices/project-structure/internal-sample/a/b/c/internal/d/e/f/accessor.go b/best-practices/project-structure/internal-sample/a/b/c/internal/d/e/f/accessor.go
new file mode 100644
index 0000000..2b199a8
--- /dev/null
+++ b/best-practices/project-structure/internal-sample/a/b/c/internal/d/e/f/accessor.go
@@ -0,0 +1,7 @@
+package f
+
+import "fmt"
+
+func Access() {
+	fmt.Println("Access it!")
+}
diff --git a/best-practices/project-structure/internal-sample/a/b/c/runner.go b/best-practices/project-structure/internal-sample/a/b/c/runner.go
new file mode 100644
index 0000000..0b72fef
--- /dev/null
+++ b/best-practices/project-structure/internal-sample/a/b/c/runner.go
@@ -0,0 +1,7 @@
+package c
+
+import "golang.source-fellows.com/project/isample/a/b/c/internal/d/e/f"
+
+func Run() {
+	f.Access()
+}
diff --git a/best-practices/project-structure/internal-sample/a/b/g/helper.go b/best-practices/project-structure/internal-sample/a/b/g/helper.go
new file mode 100644
index 0000000..4e539b8
--- /dev/null
+++ b/best-practices/project-structure/internal-sample/a/b/g/helper.go
@@ -0,0 +1,7 @@
+package g
+
+import "fmt"
+
+func Help() {
+	fmt.Println("Help me! cannot access")
+}
diff --git a/best-practices/project-structure/internal-sample/go.mod b/best-practices/project-structure/internal-sample/go.mod
new file mode 100644
index 0000000..7550f0f
--- /dev/null
+++ b/best-practices/project-structure/internal-sample/go.mod
@@ -0,0 +1,3 @@
+module golang.source-fellows.com/project/isample
+
+go 1.14
diff --git a/best-practices/project-structure/layer-sample/cmd/main.go b/best-practices/project-structure/layer-sample/cmd/main.go
new file mode 100644
index 0000000..aed3df1
--- /dev/null
+++ b/best-practices/project-structure/layer-sample/cmd/main.go
@@ -0,0 +1,12 @@
+package main
+
+import (
+	"fmt"
+
+	"layeredsample/models"
+)
+
+func main() {
+	c := models.CustomerModel{}
+	fmt.Println(c)
+}
diff --git a/best-practices/project-structure/layer-sample/go.mod b/best-practices/project-structure/layer-sample/go.mod
new file mode 100644
index 0000000..11fd81c
--- /dev/null
+++ b/best-practices/project-structure/layer-sample/go.mod
@@ -0,0 +1,3 @@
+module layeredsample
+
+go 1.14
diff --git a/best-practices/project-structure/layer-sample/go.sum b/best-practices/project-structure/layer-sample/go.sum
new file mode 100644
index 0000000..16e9303
--- /dev/null
+++ b/best-practices/project-structure/layer-sample/go.sum
@@ -0,0 +1 @@
+golang.source-fellows.com v0.0.0-20200619133407-79aa8981720c h1:c0BKYhs4PULAm3Hb5f+t9AcmPRScdSAkeuajndyOMLQ=
diff --git a/best-practices/project-structure/layer-sample/handlers/customer.go b/best-practices/project-structure/layer-sample/handlers/customer.go
new file mode 100644
index 0000000..5d78ee3
--- /dev/null
+++ b/best-practices/project-structure/layer-sample/handlers/customer.go
@@ -0,0 +1,3 @@
+package handlers
+
+type CustomerHandler struct{}
diff --git a/best-practices/project-structure/layer-sample/handlers/registration.go b/best-practices/project-structure/layer-sample/handlers/registration.go
new file mode 100644
index 0000000..1f8adb1
--- /dev/null
+++ b/best-practices/project-structure/layer-sample/handlers/registration.go
@@ -0,0 +1,3 @@
+package handlers
+
+type RegistrationHandler struct{}
diff --git a/best-practices/project-structure/layer-sample/models/customer.go b/best-practices/project-structure/layer-sample/models/customer.go
new file mode 100644
index 0000000..3a7020e
--- /dev/null
+++ b/best-practices/project-structure/layer-sample/models/customer.go
@@ -0,0 +1,11 @@
+package models
+
+import "layeredsample/storage"
+
+type CustomerModel struct {
+	db storage.DB
+}
+
+func (c *CustomerModel) Save() {
+
+}
diff --git a/best-practices/project-structure/layer-sample/models/registration.go b/best-practices/project-structure/layer-sample/models/registration.go
new file mode 100644
index 0000000..4000b66
--- /dev/null
+++ b/best-practices/project-structure/layer-sample/models/registration.go
@@ -0,0 +1,3 @@
+package models
+
+type RegistrationModel struct{}
diff --git a/best-practices/project-structure/layer-sample/services/customer.go b/best-practices/project-structure/layer-sample/services/customer.go
new file mode 100644
index 0000000..e69de29
diff --git a/best-practices/project-structure/layer-sample/services/registration.go b/best-practices/project-structure/layer-sample/services/registration.go
new file mode 100644
index 0000000..e69de29
diff --git a/best-practices/project-structure/layer-sample/storage/db.go b/best-practices/project-structure/layer-sample/storage/db.go
new file mode 100644
index 0000000..bc57987
--- /dev/null
+++ b/best-practices/project-structure/layer-sample/storage/db.go
@@ -0,0 +1,9 @@
+package storage
+
+import "layeredsample/models"
+
+type DBStorage struct{}
+
+func (d *DBStorage) Save(c models.CustomerModel) {
+
+}
diff --git a/best-practices/project-structure/layer-sample/storage/xml.go b/best-practices/project-structure/layer-sample/storage/xml.go
new file mode 100644
index 0000000..81eeede
--- /dev/null
+++ b/best-practices/project-structure/layer-sample/storage/xml.go
@@ -0,0 +1,3 @@
+package storage
+
+type XMLStorage struct{}
diff --git a/best-practices/project-structure/module-sample/cmd/main.go b/best-practices/project-structure/module-sample/cmd/main.go
new file mode 100644
index 0000000..e69de29
diff --git a/best-practices/project-structure/module-sample/registration/handler.go b/best-practices/project-structure/module-sample/registration/handler.go
new file mode 100644
index 0000000..e69de29
diff --git a/best-practices/project-structure/module-sample/registration/registration.go b/best-practices/project-structure/module-sample/registration/registration.go
new file mode 100644
index 0000000..e69de29
diff --git a/best-practices/project-structure/module-sample/registration/service.go b/best-practices/project-structure/module-sample/registration/service.go
new file mode 100644
index 0000000..e69de29
diff --git a/best-practices/project-structure/module-sample/storage/db.go b/best-practices/project-structure/module-sample/storage/db.go
new file mode 100644
index 0000000..e69de29
diff --git a/best-practices/project-structure/module-sample/storage/xml.go b/best-practices/project-structure/module-sample/storage/xml.go
new file mode 100644
index 0000000..e69de29
diff --git a/best-practices/project-structure/module-sample/user/handler.go b/best-practices/project-structure/module-sample/user/handler.go
new file mode 100644
index 0000000..e69de29
diff --git a/best-practices/project-structure/module-sample/user/service.go b/best-practices/project-structure/module-sample/user/service.go
new file mode 100644
index 0000000..e69de29
diff --git a/best-practices/project-structure/module-sample/user/user.go b/best-practices/project-structure/module-sample/user/user.go
new file mode 100644
index 0000000..e69de29
diff --git a/best-practices/project-structure/packagename/cmd/main.go b/best-practices/project-structure/packagename/cmd/main.go
new file mode 100644
index 0000000..ca58e2b
--- /dev/null
+++ b/best-practices/project-structure/packagename/cmd/main.go
@@ -0,0 +1,14 @@
+package main
+
+import (
+	"encoding/json"
+
+	"golang.source-fellows.com/samples/packagename/util"
+)
+
+func main() {
+
+	util.ParseValue("Hello World")
+	json.Marshal("Hello World")
+
+}
diff --git a/best-practices/project-structure/packagename/go.mod b/best-practices/project-structure/packagename/go.mod
new file mode 100644
index 0000000..631e37d
--- /dev/null
+++ b/best-practices/project-structure/packagename/go.mod
@@ -0,0 +1,3 @@
+module golang.source-fellows.com/samples/packagename
+
+go 1.14
diff --git a/best-practices/project-structure/packagename/util/log.go b/best-practices/project-structure/packagename/util/log.go
new file mode 100644
index 0000000..d3f9e54
--- /dev/null
+++ b/best-practices/project-structure/packagename/util/log.go
@@ -0,0 +1,7 @@
+package util
+
+import "fmt"
+
+func ParseValue(text string) {
+	fmt.Println(text)
+}
diff --git a/best-practices/single-method-interface/main.go b/best-practices/single-method-interface/main.go
new file mode 100644
index 0000000..f7f4cd2
--- /dev/null
+++ b/best-practices/single-method-interface/main.go
@@ -0,0 +1,28 @@
+package main
+
+import (
+	"fmt"
+)
+
+type Logger interface {
+	Log(message string)
+}
+
+type LoggerFunc func(message string)
+
+func (l LoggerFunc) Log(message string) {
+	l(message)
+}
+
+func MyLogFunc(message string) {
+	fmt.Printf("I log %s\n", message)
+}
+
+func myMethodTakesTheLog(l Logger) {
+	l.Log("my log message")
+}
+
+func main() {
+	logger := LoggerFunc(MyLogFunc)
+	myMethodTakesTheLog(logger)
+}
diff --git a/best-practices/struct-to-text/main.go b/best-practices/struct-to-text/main.go
new file mode 100644
index 0000000..e470b3c
--- /dev/null
+++ b/best-practices/struct-to-text/main.go
@@ -0,0 +1,16 @@
+package main
+
+import "fmt"
+
+type Tester struct {
+	Name     string
+	Alter    int
+	Sonstwas string
+}
+
+func main() {
+
+	t := &Tester{Name: "Dingo", Alter: 3, Sonstwas: "Wert"}
+	fmt.Printf("%+v\n", t)
+
+}
diff --git a/best-practices/synchron-api/main.go b/best-practices/synchron-api/main.go
new file mode 100644
index 0000000..0a327e4
--- /dev/null
+++ b/best-practices/synchron-api/main.go
@@ -0,0 +1,11 @@
+package main
+
+type Reader struct {
+	c chan string
+}
+
+
+
+func main() {
+
+}
diff --git a/cloud-provider/aws-beanstak-sample/.gitignore b/cloud-provider/aws-beanstak-sample/.gitignore
new file mode 100644
index 0000000..bca646a
--- /dev/null
+++ b/cloud-provider/aws-beanstak-sample/.gitignore
@@ -0,0 +1,5 @@
+
+# Elastic Beanstalk Files
+.elasticbeanstalk/*
+!.elasticbeanstalk/*.cfg.yml
+!.elasticbeanstalk/*.global.yml
diff --git a/cloud-provider/aws-beanstak-sample/Buildfile b/cloud-provider/aws-beanstak-sample/Buildfile
new file mode 100644
index 0000000..e8aed28
--- /dev/null
+++ b/cloud-provider/aws-beanstak-sample/Buildfile
@@ -0,0 +1 @@
+make: ./build.sh
\ No newline at end of file
diff --git a/cloud-provider/aws-beanstak-sample/Dockerfile b/cloud-provider/aws-beanstak-sample/Dockerfile
new file mode 100644
index 0000000..72ba415
--- /dev/null
+++ b/cloud-provider/aws-beanstak-sample/Dockerfile
@@ -0,0 +1,12 @@
+FROM ubuntu
+
+RUN apt-get update && apt-get install \
+    build-essential zlib1g-dev libssl-dev libncurses-dev \
+    libffi-dev libsqlite3-dev libreadline-dev libbz2-dev git curl wget -y
+
+WORKDIR /opt/
+RUN git clone https://github.com/aws/aws-elastic-beanstalk-cli-setup.git
+
+RUN ./aws-elastic-beanstalk-cli-setup/scripts/bundled_installer
+
+ENV PATH="/root/.ebcli-virtual-env/executables:/root/.pyenv/versions/3.7.2/bin:$PATH"
\ No newline at end of file
diff --git a/cloud-provider/aws-beanstak-sample/Procfile b/cloud-provider/aws-beanstak-sample/Procfile
new file mode 100644
index 0000000..4997a78
--- /dev/null
+++ b/cloud-provider/aws-beanstak-sample/Procfile
@@ -0,0 +1 @@
+web: application
\ No newline at end of file
diff --git a/cloud-provider/aws-beanstak-sample/README.txt b/cloud-provider/aws-beanstak-sample/README.txt
new file mode 100644
index 0000000..04d10d4
--- /dev/null
+++ b/cloud-provider/aws-beanstak-sample/README.txt
@@ -0,0 +1,13 @@
+Nutzer der EB-Cli über Docker-Container:
+
+Image erstellen und ausführen:
+```
+docker build -t elasticbeanstalk-cli .
+docker run -v `pwd`:/app -it elasticbeanstalk-cli /bin/bash
+```
+
+Innerhalb des Containers müssen folgende Kommandos ausgeführt werden:
+```
+eb init -p go go-beanstalk-sample --region eu-central-1
+eb create go-env
+```
\ No newline at end of file
diff --git a/cloud-provider/aws-beanstak-sample/build.sh b/cloud-provider/aws-beanstak-sample/build.sh
new file mode 100755
index 0000000..9005fbc
--- /dev/null
+++ b/cloud-provider/aws-beanstak-sample/build.sh
@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+
+# Build app
+go build -o application
\ No newline at end of file
diff --git a/cloud-provider/aws-beanstak-sample/go.mod b/cloud-provider/aws-beanstak-sample/go.mod
new file mode 100644
index 0000000..325be1e
--- /dev/null
+++ b/cloud-provider/aws-beanstak-sample/go.mod
@@ -0,0 +1,3 @@
+module golang.source-fellows.com/samples/cloud/beanstalk
+
+go 1.14
diff --git a/cloud-provider/aws-beanstak-sample/main.go b/cloud-provider/aws-beanstak-sample/main.go
new file mode 100644
index 0000000..84cc6ca
--- /dev/null
+++ b/cloud-provider/aws-beanstak-sample/main.go
@@ -0,0 +1,16 @@
+package main
+
+import (
+	"fmt"
+	"net/http"
+	"time"
+)
+
+func greet(w http.ResponseWriter, r *http.Request) {
+	fmt.Fprintf(w, "Hello World! %s", time.Now())
+}
+
+func main() {
+	http.HandleFunc("/", greet)
+	http.ListenAndServe(":5000", nil)
+}
diff --git a/cloud-provider/aws-lambda-go/README.txt b/cloud-provider/aws-lambda-go/README.txt
new file mode 100644
index 0000000..4587d73
--- /dev/null
+++ b/cloud-provider/aws-lambda-go/README.txt
@@ -0,0 +1,10 @@
+```
+GOOS=linux go build main.go
+zip function.zip main
+aws lambda create-function \
+    --function-name aws-lambda-sample \
+    --runtime go1.x \
+    --zip-file fileb://function.zip
+    --handler main
+    --role arn:aws:iam::<xx>:role/<xx>
+```
\ No newline at end of file
diff --git a/cloud-provider/aws-lambda-go/function.zip b/cloud-provider/aws-lambda-go/function.zip
new file mode 100644
index 0000000..6a7bf1d
Binary files /dev/null and b/cloud-provider/aws-lambda-go/function.zip differ
diff --git a/cloud-provider/aws-lambda-go/main.go b/cloud-provider/aws-lambda-go/main.go
new file mode 100644
index 0000000..14a3eb8
--- /dev/null
+++ b/cloud-provider/aws-lambda-go/main.go
@@ -0,0 +1,24 @@
+package main
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/aws/aws-lambda-go/lambda"
+	"github.com/aws/aws-lambda-go/lambdacontext"
+)
+
+type MyEvent struct {
+	Name string `json:"name"`
+}
+
+func HandleRequest(ctx context.Context, name MyEvent) (string, error) {
+
+	lc, _ := lambdacontext.FromContext(ctx)
+
+	return fmt.Sprintf("Hello %s! %s", name.Name, lc.AwsRequestID), nil
+}
+
+func main() {
+	lambda.Start(HandleRequest)
+}
diff --git a/cloud-provider/azure-kubernetes/Dockerfile b/cloud-provider/azure-kubernetes/Dockerfile
new file mode 100644
index 0000000..4deb6b7
--- /dev/null
+++ b/cloud-provider/azure-kubernetes/Dockerfile
@@ -0,0 +1,12 @@
+FROM golang:1 as builder
+
+WORKDIR /go/src/app
+COPY *.go .
+RUN CGO_ENABLED=0 go build .
+
+####################################
+
+FROM alpine
+COPY --from=builder /go/src/app/app .
+EXPOSE 8080
+CMD [ "./app" ]
diff --git a/cloud-provider/azure-kubernetes/README.txt b/cloud-provider/azure-kubernetes/README.txt
new file mode 100644
index 0000000..9733181
--- /dev/null
+++ b/cloud-provider/azure-kubernetes/README.txt
@@ -0,0 +1,11 @@
+
+```
+eval $(minikube docker-env)
+docker build -t minikube-golang-sample .
+
+kubectl create -f manifest.yml
+kubectl get pod
+kubectl expose deployment golang-sample --type=NodePort
+kubectl get service
+minikube service golang-sample --url
+```
diff --git a/cloud-provider/azure-kubernetes/main.go b/cloud-provider/azure-kubernetes/main.go
new file mode 100644
index 0000000..00a35e4
--- /dev/null
+++ b/cloud-provider/azure-kubernetes/main.go
@@ -0,0 +1,16 @@
+package main
+
+import (
+	"fmt"
+	"net/http"
+	"time"
+)
+
+func greet(w http.ResponseWriter, r *http.Request) {
+	fmt.Fprintf(w, "Hello World! %s", time.Now())
+}
+
+func main() {
+	http.HandleFunc("/", greet)
+	http.ListenAndServe(":8080", nil)
+}
diff --git a/cloud-provider/azure-kubernetes/manifest.yml b/cloud-provider/azure-kubernetes/manifest.yml
new file mode 100644
index 0000000..3bd12d9
--- /dev/null
+++ b/cloud-provider/azure-kubernetes/manifest.yml
@@ -0,0 +1,26 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  creationTimestamp: null
+  labels:
+    app: go-azure-sample
+  name: go-azure-sample
+spec:
+  replicas: 2
+  selector:
+    matchLabels:
+      app: go-azure-sample
+  strategy: {}
+  template:
+    metadata:
+      creationTimestamp: null
+      labels:
+        app: go-azure-sample
+    spec:
+      containers:
+      - image: trainingfellow.azurecr.io/go-azure-sample
+        name: go-azure-sample
+        resources: {}
+        ports:
+          - containerPort: 8080
+status: {}
\ No newline at end of file
diff --git a/cloud-provider/docker-compose/Dockerfile.receiver b/cloud-provider/docker-compose/Dockerfile.receiver
new file mode 100644
index 0000000..ffd7736
--- /dev/null
+++ b/cloud-provider/docker-compose/Dockerfile.receiver
@@ -0,0 +1,13 @@
+FROM golang:1 as builder
+
+WORKDIR /go/src/app
+
+COPY go.* ./
+RUN go mod download
+
+COPY . .
+RUN CGO_ENABLED=0 go build -o app ./cmd/receiver
+
+FROM alpine:latest
+COPY --from=builder /go/src/app .
+CMD ["./app"]
diff --git a/cloud-provider/docker-compose/Dockerfile.sender b/cloud-provider/docker-compose/Dockerfile.sender
new file mode 100644
index 0000000..805412d
--- /dev/null
+++ b/cloud-provider/docker-compose/Dockerfile.sender
@@ -0,0 +1,13 @@
+FROM golang:1 as builder
+
+WORKDIR /go/src/app
+
+COPY go.* ./
+RUN go mod download
+
+COPY . .
+RUN CGO_ENABLED=0 go build -o app ./cmd/sender
+
+FROM alpine:latest
+COPY --from=builder /go/src/app .
+CMD ["./app"]
diff --git a/cloud-provider/docker-compose/cmd/receiver/main.go b/cloud-provider/docker-compose/cmd/receiver/main.go
new file mode 100644
index 0000000..e0ccec5
--- /dev/null
+++ b/cloud-provider/docker-compose/cmd/receiver/main.go
@@ -0,0 +1,70 @@
+package main
+
+import (
+	"context"
+	"log"
+	"os"
+	"sync"
+	"time"
+
+	"github.com/nats-io/nats.go"
+)
+
+type Message struct {
+	Text string
+}
+
+func connectNATS(ctx context.Context, url string) (*nats.Conn, error) {
+	var err error
+	for {
+		select {
+		case <-ctx.Done():
+			return nil, err
+		default:
+			var nc *nats.Conn
+			nc, err = nats.Connect(url)
+			if err == nil {
+				return nc, err
+			}
+		}
+	}
+
+}
+
+func main() {
+
+	url := nats.DefaultURL
+	if v, ok := os.LookupEnv("NATS_URL"); ok {
+		url = v
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+	nc, err := connectNATS(ctx, url)
+	if err != nil {
+		log.Fatalf("Could not connect to server because of %v", err)
+	}
+	defer nc.Close()
+	log.Println("successfully connected to NATS server")
+
+	c, _ := nats.NewEncodedConn(nc, nats.JSON_ENCODER)
+	defer c.Close()
+
+	wg := sync.WaitGroup{}
+	wg.Add(1)
+
+	sub, err := c.Subscribe("testing", func(message *Message) {
+		log.Printf("neue Nachricht %+v", message)
+	})
+
+	if err != nil {
+		log.Fatalf("Could not subscribe because of %v", err)
+	}
+
+	log.Printf("Warte auf Nachrichten")
+	wg.Wait()
+
+	sub.Unsubscribe()
+	sub.Drain()
+
+}
diff --git a/cloud-provider/docker-compose/cmd/sender/main.go b/cloud-provider/docker-compose/cmd/sender/main.go
new file mode 100644
index 0000000..12e2a8c
--- /dev/null
+++ b/cloud-provider/docker-compose/cmd/sender/main.go
@@ -0,0 +1,44 @@
+package main
+
+import (
+	"log"
+	"os"
+	"time"
+
+	"github.com/nats-io/nats.go"
+)
+
+type Message struct {
+	Text string
+}
+
+func sendMessage(url string) error {
+	nc, err := nats.Connect(url)
+	if err != nil {
+		return err
+	}
+	defer nc.Close()
+	c, _ := nats.NewEncodedConn(nc, nats.JSON_ENCODER)
+	defer c.Close()
+
+	return c.Publish("testing", &Message{"Hello World"})
+}
+
+func main() {
+
+	url := nats.DefaultURL
+	if v, ok := os.LookupEnv("NATS_URL"); ok {
+		url = v
+	}
+
+	for {
+		err := sendMessage(url)
+		if err != nil {
+			log.Println(err)
+		} else {
+			log.Println("Nachricht versendet")
+		}
+		time.Sleep(4 * time.Second)
+	}
+
+}
diff --git a/cloud-provider/docker-compose/docker-compose.yml b/cloud-provider/docker-compose/docker-compose.yml
new file mode 100644
index 0000000..22a34e6
--- /dev/null
+++ b/cloud-provider/docker-compose/docker-compose.yml
@@ -0,0 +1,16 @@
+version: '3'
+services:
+  sender-application:
+    build:
+      context: .
+      dockerfile: Dockerfile.sender
+    environment:
+      NATS_URL: "nats://nats-server:4222"
+  receiver-application:
+    build:
+      context: .
+      dockerfile: Dockerfile.receiver
+    environment:
+        NATS_URL: "nats://nats-server:4222"
+  nats-server:
+    image: nats
\ No newline at end of file
diff --git a/cloud-provider/docker-compose/go.mod b/cloud-provider/docker-compose/go.mod
new file mode 100644
index 0000000..fd82645
--- /dev/null
+++ b/cloud-provider/docker-compose/go.mod
@@ -0,0 +1,5 @@
+module golang.source-fellows.com/samples/cloud/dockercompose
+
+go 1.14
+
+require github.com/nats-io/nats.go v1.10.0 // indirect
diff --git a/cloud-provider/docker-compose/go.sum b/cloud-provider/docker-compose/go.sum
new file mode 100644
index 0000000..3dd11f0
--- /dev/null
+++ b/cloud-provider/docker-compose/go.sum
@@ -0,0 +1,17 @@
+github.com/nats-io/jwt v0.3.2 h1:+RB5hMpXUUA2dfxuhBTEkMOrYmM+gKIZYS1KjSostMI=
+github.com/nats-io/jwt v0.3.2/go.mod h1:/euKqTS1ZD+zzjYrY7pseZrTtWQSjujC7xjPc8wL6eU=
+github.com/nats-io/nats.go v1.10.0 h1:L8qnKaofSfNFbXg0C5F71LdjPRnmQwSsA4ukmkt1TvY=
+github.com/nats-io/nats.go v1.10.0/go.mod h1:AjGArbfyR50+afOUotNX2Xs5SYHf+CoOa5HH1eEl2HE=
+github.com/nats-io/nkeys v0.1.3/go.mod h1:xpnFELMwJABBLVhffcfd1MZx6VsNRFpEugbxziKVo7w=
+github.com/nats-io/nkeys v0.1.4 h1:aEsHIssIk6ETN5m2/MD8Y4B2X7FfXrBAUdkyRvbVYzA=
+github.com/nats-io/nkeys v0.1.4/go.mod h1:XdZpAbhgyyODYqjTawOnIOI7VlbKSarI9Gfy1tqEu/s=
+github.com/nats-io/nuid v1.0.1 h1:5iA8DT8V7q8WK2EScv2padNa/rTESc1KdnPw4TC2paw=
+github.com/nats-io/nuid v1.0.1/go.mod h1:19wcPz3Ph3q0Jbyiqsd0kePYG7A95tJPxeL+1OSON2c=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
+golang.org/x/crypto v0.0.0-20200323165209-0ec3e9974c59 h1:3zb4D3T4G8jdExgVU/95+vQXfpEPiMdCaZgmGVxjNHM=
+golang.org/x/crypto v0.0.0-20200323165209-0ec3e9974c59/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
+golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
diff --git a/cloud-provider/docker-sample-multistage/Dockerfile b/cloud-provider/docker-sample-multistage/Dockerfile
new file mode 100644
index 0000000..758ce51
--- /dev/null
+++ b/cloud-provider/docker-sample-multistage/Dockerfile
@@ -0,0 +1,11 @@
+FROM golang:1 as builder
+
+WORKDIR /go/src/app
+COPY *.go .
+RUN CGO_ENABLED=0 go build .
+
+####################################
+
+FROM alpine
+COPY --from=builder /go/src/app/app .
+CMD [ "./app" ]
diff --git a/cloud-provider/docker-sample-multistage/main.go b/cloud-provider/docker-sample-multistage/main.go
new file mode 100644
index 0000000..20f0d0f
--- /dev/null
+++ b/cloud-provider/docker-sample-multistage/main.go
@@ -0,0 +1,9 @@
+package main
+
+import (
+	"fmt"
+)
+
+func main() {
+	fmt.Println("Hello World!")
+}
diff --git a/cloud-provider/docker-sample/Dockerfile b/cloud-provider/docker-sample/Dockerfile
new file mode 100644
index 0000000..932f87d
--- /dev/null
+++ b/cloud-provider/docker-sample/Dockerfile
@@ -0,0 +1,7 @@
+FROM golang
+
+WORKDIR /go/src/app
+COPY *.go .
+RUN go install .
+
+CMD ["app"]
\ No newline at end of file
diff --git a/cloud-provider/docker-sample/main.go b/cloud-provider/docker-sample/main.go
new file mode 100644
index 0000000..20f0d0f
--- /dev/null
+++ b/cloud-provider/docker-sample/main.go
@@ -0,0 +1,9 @@
+package main
+
+import (
+	"fmt"
+)
+
+func main() {
+	fmt.Println("Hello World!")
+}
diff --git a/cloud-provider/go-cloud/Dockerfile b/cloud-provider/go-cloud/Dockerfile
new file mode 100644
index 0000000..368339e
--- /dev/null
+++ b/cloud-provider/go-cloud/Dockerfile
@@ -0,0 +1,14 @@
+FROM golang:1 as builder
+
+WORKDIR /go/src/app
+COPY go.* ./
+RUN go mod download
+COPY *.go ./
+RUN CGO_ENABLED=0 go build .
+
+####################################
+
+FROM alpine
+COPY --from=builder /go/src/app/gcloud .
+EXPOSE 8080
+CMD [ "./gcloud" ]
diff --git a/cloud-provider/go-cloud/docker-compose.yml b/cloud-provider/go-cloud/docker-compose.yml
new file mode 100644
index 0000000..b59c535
--- /dev/null
+++ b/cloud-provider/go-cloud/docker-compose.yml
@@ -0,0 +1,13 @@
+version: '3'
+services:
+  application:
+    build: .
+    ports:
+      - 8080:8080
+  minio-server:
+    image: minio/minio
+    command: server /data
+    volumes:
+      - ./minio:/data
+    ports:
+      - 9000:9000
\ No newline at end of file
diff --git a/cloud-provider/go-cloud/go.mod b/cloud-provider/go-cloud/go.mod
new file mode 100644
index 0000000..b6661d2
--- /dev/null
+++ b/cloud-provider/go-cloud/go.mod
@@ -0,0 +1,15 @@
+module golang.source-fellows.com/gobuch/gcloud
+
+go 1.14
+
+require (
+	github.com/gin-gonic/gin v1.6.3 // indirect
+	github.com/go-playground/validator/v10 v10.3.0 // indirect
+	github.com/json-iterator/go v1.1.10 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.1 // indirect
+	gocloud.dev v0.20.0 // indirect
+	golang.org/x/sys v0.0.0-20200808120158-1030fc2bf1d9 // indirect
+	google.golang.org/protobuf v1.25.0 // indirect
+	gopkg.in/yaml.v2 v2.3.0 // indirect
+)
diff --git a/cloud-provider/go-cloud/go.sum b/cloud-provider/go-cloud/go.sum
new file mode 100644
index 0000000..64b072a
--- /dev/null
+++ b/cloud-provider/go-cloud/go.sum
@@ -0,0 +1,478 @@
+bazil.org/fuse v0.0.0-20180421153158-65cc252bf669/go.mod h1:Xbm+BRKSBEpa4q4hTSxohYNQpsxXPbPry4JJWOB3LB8=
+cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
+cloud.google.com/go v0.39.0/go.mod h1:rVLT6fkc8chs9sfPtFc1SBH6em7n+ZoXaG+87tDISts=
+cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
+cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
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diff --git a/cloud-provider/go-cloud/main.go b/cloud-provider/go-cloud/main.go
new file mode 100644
index 0000000..f6507a1
--- /dev/null
+++ b/cloud-provider/go-cloud/main.go
@@ -0,0 +1,76 @@
+package main
+
+import (
+	"io"
+	"log"
+	"net/http"
+	"os"
+
+	"github.com/gin-gonic/gin"
+	"gocloud.dev/blob"
+	_ "gocloud.dev/blob/s3blob"
+)
+
+var serverURL string
+
+func readfile(c *gin.Context) {
+	ctx := c.Request.Context()
+	bucket, err := blob.OpenBucket(ctx, serverURL)
+	if err != nil {
+		c.AbortWithStatus(http.StatusInternalServerError)
+		return
+	}
+	defer bucket.Close()
+
+	reader, err := bucket.NewReader(ctx, "gopher.png", nil)
+	if err != nil {
+		c.AbortWithStatus(http.StatusInternalServerError)
+		return
+	}
+	defer reader.Close()
+
+	c.Header("Content-Type", "image/png")
+	io.Copy(c.Writer, reader)
+
+}
+
+func writefile(c *gin.Context) {
+	ctx := c.Request.Context()
+	bucket, err := blob.OpenBucket(ctx, serverURL)
+	if err != nil {
+		c.AbortWithStatus(http.StatusInternalServerError)
+		return
+	}
+	defer bucket.Close()
+
+	writer, err := bucket.NewWriter(ctx, "gopher.png", nil)
+	if err != nil {
+		log.Println(err)
+		c.AbortWithStatus(http.StatusInternalServerError)
+		return
+	}
+	defer writer.Close()
+	_, err = io.Copy(writer, c.Request.Body)
+	if err != nil {
+		log.Println(err)
+		c.AbortWithStatus(http.StatusInternalServerError)
+		return
+	}
+
+	c.Status(http.StatusCreated)
+}
+
+func main() {
+
+	os.Setenv("AWS_ACCESS_KEY", "minioadmin")
+	os.Setenv("AWS_SECRET_KEY", "minioadmin")
+
+	log.Println("starting...")
+
+	serverURL = "s3://gocloud?endpoint=localhost:9000&disableSSL=true&s3ForcePathStyle=true&region=DE"
+
+	r := gin.Default()
+	r.GET("/", readfile)
+	r.POST("/", writefile)
+	r.Run()
+}
diff --git a/cloud-provider/go-cloud/manifest.yml b/cloud-provider/go-cloud/manifest.yml
new file mode 100644
index 0000000..bdc42e2
--- /dev/null
+++ b/cloud-provider/go-cloud/manifest.yml
@@ -0,0 +1,36 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  creationTimestamp: null
+  labels:
+    app: gcloud-sample
+  name: gcloud-sample
+spec:
+  replicas: 2
+  selector:
+    matchLabels:
+      app: gcloud-sample
+  strategy: {}
+  template:
+    metadata:
+      creationTimestamp: null
+      labels:
+        app: gcloud-sample
+    spec:
+      containers:
+      - image: minikube-gcloud-sample
+        name: gcloud-sample-service
+        imagePullPolicy: Never
+        resources: {}
+        ports:
+          - containerPort: 8080
+      - image: minio/minio
+        name: minio
+        args: ["server", "/data"]
+        volumeMounts:
+          - name: minio-storage
+            mountPath: /data
+      volumes:
+        - name: minio-storage
+          emptyDir: {}
+status: {}
\ No newline at end of file
diff --git a/cloud-provider/go-cloud/minio/gocloud/gopher.png b/cloud-provider/go-cloud/minio/gocloud/gopher.png
new file mode 100644
index 0000000..8262174
Binary files /dev/null and b/cloud-provider/go-cloud/minio/gocloud/gopher.png differ
diff --git a/cloud-provider/google-cloud-hello/.gitignore b/cloud-provider/google-cloud-hello/.gitignore
new file mode 100644
index 0000000..2712ffa
--- /dev/null
+++ b/cloud-provider/google-cloud-hello/.gitignore
@@ -0,0 +1,14 @@
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+# delve output
+debug
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
diff --git a/cloud-provider/google-cloud-hello/.idea/.gitignore b/cloud-provider/google-cloud-hello/.idea/.gitignore
new file mode 100644
index 0000000..5c98b42
--- /dev/null
+++ b/cloud-provider/google-cloud-hello/.idea/.gitignore
@@ -0,0 +1,2 @@
+# Default ignored files
+/workspace.xml
\ No newline at end of file
diff --git a/cloud-provider/google-cloud-hello/.idea/externalDependencies.xml b/cloud-provider/google-cloud-hello/.idea/externalDependencies.xml
new file mode 100644
index 0000000..fc2f618
--- /dev/null
+++ b/cloud-provider/google-cloud-hello/.idea/externalDependencies.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+    <component name="ExternalDependencies">
+          <plugin id="com.google.gct.core" />
+    </component>
+</project>
diff --git a/cloud-provider/google-cloud-hello/.idea/go-hello-world.iml b/cloud-provider/google-cloud-hello/.idea/go-hello-world.iml
new file mode 100644
index 0000000..c956989
--- /dev/null
+++ b/cloud-provider/google-cloud-hello/.idea/go-hello-world.iml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="WEB_MODULE" version="4">
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/cloud-provider/google-cloud-hello/.idea/modules.xml b/cloud-provider/google-cloud-hello/.idea/modules.xml
new file mode 100644
index 0000000..94566e0
--- /dev/null
+++ b/cloud-provider/google-cloud-hello/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/go-hello-world.iml" filepath="$PROJECT_DIR$/.idea/go-hello-world.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/cloud-provider/google-cloud-hello/.vscode/extensions.json b/cloud-provider/google-cloud-hello/.vscode/extensions.json
new file mode 100644
index 0000000..2767220
--- /dev/null
+++ b/cloud-provider/google-cloud-hello/.vscode/extensions.json
@@ -0,0 +1,5 @@
+{
+    "recommendations": [
+        "googlecloudtools.cloudcode",
+    ] 
+}
diff --git a/cloud-provider/google-cloud-hello/.vscode/launch.json b/cloud-provider/google-cloud-hello/.vscode/launch.json
new file mode 100644
index 0000000..d2caaaf
--- /dev/null
+++ b/cloud-provider/google-cloud-hello/.vscode/launch.json
@@ -0,0 +1,22 @@
+{
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "name": "Run on Kubernetes",
+      "type": "cloudcode.kubernetes",
+      "request": "launch",
+      "skaffoldConfig": "${workspaceFolder}/skaffold.yaml",
+      "watch": true,
+      "cleanUp": true,
+      "portForward": true,
+      "imageRegistry": "gcr.io/gobuch-72abe"
+    },
+    {
+      "type": "go",
+      "request": "launch",
+      "name": "Launch (local)",
+      "mode": "auto",
+      "program": "${workspaceFolder}/cmd/hello-world"
+    }
+  ]
+}
diff --git a/cloud-provider/google-cloud-hello/.vscode/tasks.json b/cloud-provider/google-cloud-hello/.vscode/tasks.json
new file mode 100644
index 0000000..77c188e
--- /dev/null
+++ b/cloud-provider/google-cloud-hello/.vscode/tasks.json
@@ -0,0 +1,42 @@
+{
+    // See https://go.microsoft.com/fwlink/?LinkId=733558
+    // for the documentation about the tasks.json format
+    "version": "2.0.0",
+    "presentation": {
+        "panel": "shared",
+        "showReuseMessage": true,
+    },
+    "tasks": [
+        {
+            "group": "build",
+            "label": "Build container image using local Docker",
+            "type": "process",
+            "command": "skaffold",
+            "args": [
+                "build",
+                "-p=no-push"
+            ],
+            "problemMatcher": [],
+        },
+        {
+            "label": "Deploy to Kubernetes cluster",
+            "type": "process",
+            "command": "skaffold",
+            "args": [
+                "run"
+            ],
+            "problemMatcher": [],
+        },
+        {
+            "label": "View application logs on Kubernetes",
+            "type": "process",
+            "command": "kubectl",
+            "args": [
+                "logs",
+                "--selector",
+                "app=hello-world"
+            ],
+            "problemMatcher": [],
+        }
+    ]
+}
diff --git a/cloud-provider/google-cloud-hello/Dockerfile b/cloud-provider/google-cloud-hello/Dockerfile
new file mode 100644
index 0000000..15e7c73
--- /dev/null
+++ b/cloud-provider/google-cloud-hello/Dockerfile
@@ -0,0 +1,29 @@
+# Use base golang image from Docker Hub
+FROM golang:1.14
+
+# Download the dlv (delve) debugger for go (you can comment this out if unused)
+RUN go get -u -v github.com/go-delve/delve/cmd/dlv
+
+WORKDIR /src/hello-world
+
+# Install dependencies in go.mod and go.sum
+COPY go.mod go.sum ./
+RUN go mod download
+
+# Copy rest of the application source code
+COPY . ./
+
+# Compile the application to /app.
+RUN go build -o /app -v ./cmd/hello-world
+
+# If you want to use the debugger, you need to modify the entrypoint to the
+# container and point it to the "dlv debug" command:
+#   * UNCOMMENT the following ENTRYPOINT statement,
+#   * COMMENT OUT the last ENTRYPOINT statement
+# Start the "dlv debug" server on port 3000 of the container.
+ENTRYPOINT ["dlv", "exec", "/app", "--continue", "--accept-multiclient", "--api-version=2", "--headless", "--listen=:3000", "--log"]
+
+# If you want to run WITHOUT the debugging server:
+#   * COMMENT OUT the previous ENTRYPOINT statements,
+#   * UNCOMMENT the following ENTRYPOINT statement.
+# ENTRYPOINT ["/app"]
diff --git a/cloud-provider/google-cloud-hello/README.md b/cloud-provider/google-cloud-hello/README.md
new file mode 100644
index 0000000..177fa96
--- /dev/null
+++ b/cloud-provider/google-cloud-hello/README.md
@@ -0,0 +1,73 @@
+# Hello World with Cloud Code
+
+![Architecture Diagram](./img/diagram.png)
+
+"Hello World" is a simple Kubernetes application that contains a single
+[Deployment](https://kubernetes.io/docs/concepts/workloads/controllers/deployment/) and a corresponding
+[Service](https://kubernetes.io/docs/concepts/services-networking/service/). The Deployment contains a
+ web server that simply prints "Hello World".
+
+----
+
+## Table of Contents
+
+* [VS Code Guide](#vs-code-guide)
+    1. [Getting Started](#vs-code-getting-started)
+    2. [What's in the box](https://cloud.google.com/code/docs/vscode/quickstart#whats_in_the_box)
+* [IntelliJ Guide](#intellij-guide)
+    1. [Getting Started](#intellij-getting-started)
+    2. [What's in the box](https://cloud.google.com/code/docs/intellij/quickstart#whats_in_the_box)    
+* [Using the Command Line](#using-the-command-line)
+
+----
+
+## VS Code Guide
+
+### VS Code Getting Started
+
+This sample was written to demonstrate how to use the Cloud Code extension for Visual Studio Code.
+
+* [Install Cloud Code for VS Code](https://cloud.google.com/code/docs/vscode/install)
+* [Creating a new app](https://cloud.google.com/code/docs/vscode/creating-an-application)
+* [Editing YAML files](https://cloud.google.com/code/docs/vscode/yaml-editing)
+
+### Using Cloud Code
+* [Set up a Google Kubernetes Engine Cluster](https://cloud.google.com/code/docs/vscode/quickstart#creating_a_google_kubernetes_engine_cluster)
+* [Running the app](https://cloud.google.com/code/docs/vscode/quickstart#running_your_app)
+* [Debug the app](https://cloud.google.com/code/docs/vscode/quickstart#debugging_your_app)
+* [View Container Logs](https://cloud.google.com/code/docs/vscode/quickstart#viewing_logs)
+* [Open a Terminal in Your Container](https://cloud.google.com/code/docs/vscode/quickstart#bonus_opening_a_terminal_in_your_container)
+----
+
+## IntelliJ Guide
+
+### IntelliJ Getting Started
+
+This sample was written to demonstrate how to use the Cloud Code plugin for IntelliJ.
+
+* [Install Cloud Code for IntelliJ](https://cloud.google.com/code/docs/intellij/install)
+* [Creating a new app](https://cloud.google.com/code/docs/intellij/creating-a-k8-app)
+* [Editing YAML files](https://cloud.google.com/code/docs/intellij/yaml-editing)
+
+### Using Cloud Code
+* [Creating an app](https://cloud.google.com/code/docs/intellij/quickstart-k8s#creating_an_application)
+* [Develop an app](https://cloud.google.com/code/docs/intellij/quickstart-k8s#developing_your_application)
+* [Debug an app](https://cloud.google.com/code/docs/intellij/quickstart-k8s#debugging_your_application)
+* [View Container Logs](https://cloud.google.com/code/docs/intellij/quickstart-k8s#viewing_logs)
+----
+
+## Using the Command Line
+
+As an alternative to using Cloud Code, the application can be deployed to a cluster using standard command line tools
+
+#### Skaffold
+
+[Skaffold](https://github.com/GoogleContainerTools/skaffold) is a command line tool that can be used to build, push, and deploy your container images
+
+```bash
+skaffold run --default-repo=gcr.io/YOUR-PROJECT-ID-HERE/cloudcode
+```
+
+#### kubectl
+
+[kubectl](https://kubernetes.io/docs/tasks/tools/install-kubectl/) is the official Kubernetes command line tool. It can be used to deploy Kubernetes manifests to your cluster, but images must be build separately using another tool (for example, using the [Docker CLI](https://docs.docker.com/engine/reference/commandline/cli/))
diff --git a/cloud-provider/google-cloud-hello/cmd/hello-world/main.go b/cloud-provider/google-cloud-hello/cmd/hello-world/main.go
new file mode 100644
index 0000000..a1598af
--- /dev/null
+++ b/cloud-provider/google-cloud-hello/cmd/hello-world/main.go
@@ -0,0 +1,31 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+	"os"
+)
+
+const defaultAddr = ":8080"
+
+// main starts an http server on the $PORT environment variable.
+func main() {
+	addr := defaultAddr
+	// $PORT environment variable is provided in the Kubernetes deployment.
+	if p := os.Getenv("PORT"); p != "" {
+		addr = ":" + p
+	}
+
+	log.Printf("server starting to listen on %s", addr)
+	http.HandleFunc("/", home)
+	if err := http.ListenAndServe(addr, nil); err != nil {
+		log.Fatalf("server listen error: %+v", err)
+	}
+}
+
+// home logs the received request and returns a simple response.
+func home(w http.ResponseWriter, r *http.Request) {
+	log.Printf("received request: %s %s", r.Method, r.URL.Path)
+	fmt.Fprintf(w, "Hello, world!")
+}
diff --git a/cloud-provider/google-cloud-hello/go.mod b/cloud-provider/google-cloud-hello/go.mod
new file mode 100644
index 0000000..602e8b2
--- /dev/null
+++ b/cloud-provider/google-cloud-hello/go.mod
@@ -0,0 +1,3 @@
+module hello-world
+
+go 1.12
diff --git a/cloud-provider/google-cloud-hello/go.sum b/cloud-provider/google-cloud-hello/go.sum
new file mode 100644
index 0000000..e69de29
diff --git a/cloud-provider/google-cloud-hello/img/diagram.png b/cloud-provider/google-cloud-hello/img/diagram.png
new file mode 100644
index 0000000..bb203e4
Binary files /dev/null and b/cloud-provider/google-cloud-hello/img/diagram.png differ
diff --git a/cloud-provider/google-cloud-hello/kubernetes-manifests/hello.deployment.yaml b/cloud-provider/google-cloud-hello/kubernetes-manifests/hello.deployment.yaml
new file mode 100644
index 0000000..5ed8f1a
--- /dev/null
+++ b/cloud-provider/google-cloud-hello/kubernetes-manifests/hello.deployment.yaml
@@ -0,0 +1,27 @@
+# This Deployment manifest defines:
+# - single-replica deployment of the container image, with label "app: go-hello-world"
+# - Pod exposes port 8080
+# - specify PORT environment variable to the container process
+# Syntax reference https://kubernetes.io/docs/concepts/configuration/overview/
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: go-hello-world
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: go-hello-world
+  template:
+    metadata:
+      labels:
+        app: go-hello-world
+    spec:
+      containers:
+      - name: server
+        image: go-hello-world
+        ports:
+        - containerPort: 8080
+        env:
+        - name: PORT
+          value: "8080"
diff --git a/cloud-provider/google-cloud-hello/kubernetes-manifests/hello.service.yaml b/cloud-provider/google-cloud-hello/kubernetes-manifests/hello.service.yaml
new file mode 100644
index 0000000..38b88e2
--- /dev/null
+++ b/cloud-provider/google-cloud-hello/kubernetes-manifests/hello.service.yaml
@@ -0,0 +1,17 @@
+# This Service manifest defines:
+# - a load balancer for pods matching label "app: go-hello-world"
+# - exposing the application to the public Internet (type:LoadBalancer)
+# - routes port 80 of the load balancer to the port 8080 of the Pods.
+# Syntax reference https://kubernetes.io/docs/concepts/configuration/overview/
+apiVersion: v1
+kind: Service
+metadata:
+  name: go-hello-world-external
+spec:
+  type: LoadBalancer
+  selector:
+    app: go-hello-world
+  ports:
+  - name: http
+    port: 80
+    targetPort: 8080
diff --git a/cloud-provider/google-cloud-hello/skaffold.yaml b/cloud-provider/google-cloud-hello/skaffold.yaml
new file mode 100644
index 0000000..9d1ac4b
--- /dev/null
+++ b/cloud-provider/google-cloud-hello/skaffold.yaml
@@ -0,0 +1,16 @@
+apiVersion: skaffold/v1beta15
+kind: Config
+build:
+  tagPolicy:
+    sha256: {}
+  artifacts:
+  - context: .
+    image: go-hello-world
+deploy:
+  kubectl:
+    manifests:
+    - kubernetes-manifests/**
+profiles:
+- name: cloudbuild
+  build:
+    googleCloudBuild: {}
diff --git a/cloud-provider/google-cloud-sample/.vscode/launch.json b/cloud-provider/google-cloud-sample/.vscode/launch.json
new file mode 100644
index 0000000..72f5dec
--- /dev/null
+++ b/cloud-provider/google-cloud-sample/.vscode/launch.json
@@ -0,0 +1,14 @@
+{
+    "configurations": [
+        {
+            "name": "Run/Debug on Kubernetes",
+            "type": "cloudcode.kubernetes",
+            "request": "launch",
+            "skaffoldConfig": "${workspaceFolder}/skaffold.yaml",
+            "watch": true,
+            "cleanUp": true,
+            "portForward": true,
+            "imageRegistry": "gcr.io/gobuch-72abe/google-cloud-sample"
+        }
+    ]
+}
\ No newline at end of file
diff --git a/cloud-provider/google-cloud-sample/Dockerfile b/cloud-provider/google-cloud-sample/Dockerfile
new file mode 100644
index 0000000..4deb6b7
--- /dev/null
+++ b/cloud-provider/google-cloud-sample/Dockerfile
@@ -0,0 +1,12 @@
+FROM golang:1 as builder
+
+WORKDIR /go/src/app
+COPY *.go .
+RUN CGO_ENABLED=0 go build .
+
+####################################
+
+FROM alpine
+COPY --from=builder /go/src/app/app .
+EXPOSE 8080
+CMD [ "./app" ]
diff --git a/cloud-provider/google-cloud-sample/README.txt b/cloud-provider/google-cloud-sample/README.txt
new file mode 100644
index 0000000..ac82622
--- /dev/null
+++ b/cloud-provider/google-cloud-sample/README.txt
@@ -0,0 +1,10 @@
+
+```
+docker build -t minikube-golang-sample .
+
+kubectl create -f manifest.yml
+kubectl get pod
+kubectl expose deployment golang-sample --type=NodePort
+kubectl get service
+minikube service golang-sample --url
+```
diff --git a/cloud-provider/google-cloud-sample/deployment-manifest.yml b/cloud-provider/google-cloud-sample/deployment-manifest.yml
new file mode 100644
index 0000000..a44808b
--- /dev/null
+++ b/cloud-provider/google-cloud-sample/deployment-manifest.yml
@@ -0,0 +1,26 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  creationTimestamp: null
+  labels:
+    app: google-cloud-sample
+  name: google-cloud-sample
+spec:
+  replicas: 2
+  selector:
+    matchLabels:
+      app: google-cloud-sample
+  strategy: {}
+  template:
+    metadata:
+      creationTimestamp: null
+      labels:
+        app: google-cloud-sample
+    spec:
+      containers:
+      - image: google-cloud-sample
+        name: google-cloud-sample
+        resources: {}
+        ports:
+          - containerPort: 8080
+status: {}
\ No newline at end of file
diff --git a/cloud-provider/google-cloud-sample/main.go b/cloud-provider/google-cloud-sample/main.go
new file mode 100644
index 0000000..00a35e4
--- /dev/null
+++ b/cloud-provider/google-cloud-sample/main.go
@@ -0,0 +1,16 @@
+package main
+
+import (
+	"fmt"
+	"net/http"
+	"time"
+)
+
+func greet(w http.ResponseWriter, r *http.Request) {
+	fmt.Fprintf(w, "Hello World! %s", time.Now())
+}
+
+func main() {
+	http.HandleFunc("/", greet)
+	http.ListenAndServe(":8080", nil)
+}
diff --git a/cloud-provider/google-cloud-sample/service-manifest.yml b/cloud-provider/google-cloud-sample/service-manifest.yml
new file mode 100644
index 0000000..4b905c6
--- /dev/null
+++ b/cloud-provider/google-cloud-sample/service-manifest.yml
@@ -0,0 +1,17 @@
+# This Service manifest defines:
+# - a load balancer for pods matching label "app: go-hello-world"
+# - exposing the application to the public Internet (type:LoadBalancer)
+# - routes port 80 of the load balancer to the port 8080 of the Pods.
+# Syntax reference https://kubernetes.io/docs/concepts/configuration/overview/
+apiVersion: v1
+kind: Service
+metadata:
+  name: google-cloud-sample-external
+spec:
+  type: LoadBalancer
+  selector:
+    app: google-cloud-sample
+  ports:
+  - name: http
+    port: 80
+    targetPort: 8080
diff --git a/cloud-provider/google-cloud-sample/skaffold.yaml b/cloud-provider/google-cloud-sample/skaffold.yaml
new file mode 100644
index 0000000..1bde403
--- /dev/null
+++ b/cloud-provider/google-cloud-sample/skaffold.yaml
@@ -0,0 +1,14 @@
+apiVersion: skaffold/v2beta5
+kind: Config
+metadata:
+  name: google-cloud-sample
+build:
+  artifacts:
+    - image: google-cloud-sample
+  tagPolicy:
+    sha256: {}
+deploy:
+  kubectl:
+    manifests:
+      - deployment-manifest.yml
+      - service-manifest.yml
diff --git a/cloud-provider/minikube-sample/Dockerfile b/cloud-provider/minikube-sample/Dockerfile
new file mode 100644
index 0000000..4deb6b7
--- /dev/null
+++ b/cloud-provider/minikube-sample/Dockerfile
@@ -0,0 +1,12 @@
+FROM golang:1 as builder
+
+WORKDIR /go/src/app
+COPY *.go .
+RUN CGO_ENABLED=0 go build .
+
+####################################
+
+FROM alpine
+COPY --from=builder /go/src/app/app .
+EXPOSE 8080
+CMD [ "./app" ]
diff --git a/cloud-provider/minikube-sample/README.txt b/cloud-provider/minikube-sample/README.txt
new file mode 100644
index 0000000..9733181
--- /dev/null
+++ b/cloud-provider/minikube-sample/README.txt
@@ -0,0 +1,11 @@
+
+```
+eval $(minikube docker-env)
+docker build -t minikube-golang-sample .
+
+kubectl create -f manifest.yml
+kubectl get pod
+kubectl expose deployment golang-sample --type=NodePort
+kubectl get service
+minikube service golang-sample --url
+```
diff --git a/cloud-provider/minikube-sample/main.go b/cloud-provider/minikube-sample/main.go
new file mode 100644
index 0000000..00a35e4
--- /dev/null
+++ b/cloud-provider/minikube-sample/main.go
@@ -0,0 +1,16 @@
+package main
+
+import (
+	"fmt"
+	"net/http"
+	"time"
+)
+
+func greet(w http.ResponseWriter, r *http.Request) {
+	fmt.Fprintf(w, "Hello World! %s", time.Now())
+}
+
+func main() {
+	http.HandleFunc("/", greet)
+	http.ListenAndServe(":8080", nil)
+}
diff --git a/cloud-provider/minikube-sample/manifest.yml b/cloud-provider/minikube-sample/manifest.yml
new file mode 100644
index 0000000..74973cb
--- /dev/null
+++ b/cloud-provider/minikube-sample/manifest.yml
@@ -0,0 +1,27 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  creationTimestamp: null
+  labels:
+    app: golang-sample
+  name: golang-sample
+spec:
+  replicas: 2
+  selector:
+    matchLabels:
+      app: golang-sample
+  strategy: {}
+  template:
+    metadata:
+      creationTimestamp: null
+      labels:
+        app: golang-sample
+    spec:
+      containers:
+      - image: minikube-golang-sample
+        name: golang-sample
+        imagePullPolicy: Never
+        resources: {}
+        ports:
+          - containerPort: 8080
+status: {}
\ No newline at end of file
diff --git a/concurrency/best-practices-generator-function/main.go b/concurrency/best-practices-generator-function/main.go
new file mode 100644
index 0000000..2f91621
--- /dev/null
+++ b/concurrency/best-practices-generator-function/main.go
@@ -0,0 +1,25 @@
+package main
+
+import (
+	"fmt"
+	"math/rand"
+	"time"
+)
+
+func printOut() <-chan string {
+	c := make(chan string)
+	go func() {
+		for i := 1; ; i++ {
+			c <- fmt.Sprintf("Print %v", i)
+			time.Sleep(time.Duration(rand.Intn(500)) * time.Millisecond)
+		}
+	}()
+	return c
+}
+
+func main() {
+	c := printOut()
+	for i := 1; i < 10; i++ {
+		fmt.Println(<-c)
+	}
+}
diff --git a/concurrency/best-practices-multiplexer-select/main.go b/concurrency/best-practices-multiplexer-select/main.go
new file mode 100644
index 0000000..9226016
--- /dev/null
+++ b/concurrency/best-practices-multiplexer-select/main.go
@@ -0,0 +1,42 @@
+package main
+
+import (
+	"fmt"
+	"math/rand"
+	"time"
+)
+
+func printOut() <-chan string {
+	c := make(chan string)
+	go func() {
+		for i := 1; ; i++ {
+			c <- fmt.Sprintf("Print %v", i)
+			time.Sleep(time.Duration(rand.Intn(500)) * time.Millisecond)
+		}
+	}()
+	return c
+}
+
+func join(in1, in2 <-chan string) <-chan string {
+	out := make(chan string)
+	go func() {
+		for {
+			select {
+			case t := <-in1:
+				out <- t
+			case t := <-in2:
+				out <- t
+			}
+		}
+	}()
+	return out
+}
+
+func main() {
+	c1 := printOut()
+	c2 := printOut()
+	c3 := join(c1, c2)
+	for i := 1; i < 10; i++ {
+		fmt.Println(<-c3)
+	}
+}
diff --git a/concurrency/best-practices-multiplexer/main.go b/concurrency/best-practices-multiplexer/main.go
new file mode 100644
index 0000000..4c47671
--- /dev/null
+++ b/concurrency/best-practices-multiplexer/main.go
@@ -0,0 +1,42 @@
+package main
+
+import (
+	"fmt"
+	"math/rand"
+	"time"
+)
+
+func printOut() <-chan string {
+	c := make(chan string)
+	go func() {
+		for i := 1; ; i++ {
+			c <- fmt.Sprintf("Print %v", i)
+			time.Sleep(time.Duration(rand.Intn(500)) * time.Millisecond)
+		}
+	}()
+	return c
+}
+
+func join(in1, in2 <-chan string) <-chan string {
+	out := make(chan string)
+	go func() {
+		for {
+			out <- <-in1
+		}
+	}()
+	go func() {
+		for {
+			out <- <-in2
+		}
+	}()
+	return out
+}
+
+func main() {
+	c1 := printOut()
+	c2 := printOut()
+	c3 := join(c1, c2)
+	for i := 1; i < 10; i++ {
+		fmt.Println(<-c3)
+	}
+}
diff --git a/concurrency/best-practices-sync/main.go b/concurrency/best-practices-sync/main.go
new file mode 100644
index 0000000..c9339fc
--- /dev/null
+++ b/concurrency/best-practices-sync/main.go
@@ -0,0 +1,54 @@
+package main
+
+import (
+	"fmt"
+	"math/rand"
+	"time"
+)
+
+type Message struct {
+	text string
+	wait chan interface{}
+}
+
+func printOut() <-chan Message {
+	finish := make(chan interface{})
+	c := make(chan Message)
+	go func() {
+		for i := 1; ; i++ {
+			c <- Message{fmt.Sprintf("Print %v", i), finish}
+			time.Sleep(time.Duration(rand.Intn(9000)) * time.Millisecond)
+			<-finish
+		}
+	}()
+	return c
+}
+
+func join(in1, in2 <-chan Message) <-chan Message {
+	out := make(chan Message)
+	go func() {
+		for {
+			out <- <-in1
+		}
+	}()
+	go func() {
+		for {
+			out <- <-in2
+		}
+	}()
+	return out
+}
+
+func main() {
+	c1 := printOut()
+	c2 := printOut()
+	c3 := join(c1, c2)
+	for i := 1; i < 20; i++ {
+		message1 := <-c3
+		message2 := <-c3
+		fmt.Println(message1.text)
+		fmt.Println(message2.text)
+		message1.wait <- ""
+		message2.wait <- ""
+	}
+}
diff --git a/concurrency/best-practices-timeout/main.go b/concurrency/best-practices-timeout/main.go
new file mode 100644
index 0000000..22dcefa
--- /dev/null
+++ b/concurrency/best-practices-timeout/main.go
@@ -0,0 +1,49 @@
+package main
+
+import (
+	"fmt"
+	"math/rand"
+	"time"
+)
+
+func printOut() <-chan string {
+	c := make(chan string)
+	go func() {
+		for i := 1; ; i++ {
+			c <- fmt.Sprintf("Print %v", i)
+			time.Sleep(time.Duration(rand.Intn(500)) * time.Millisecond)
+		}
+	}()
+	return c
+}
+
+func join(in1, in2 <-chan string) <-chan string {
+	out := make(chan string)
+	go func() {
+		for {
+			select {
+			case t := <-in1:
+				out <- t
+			case t := <-in2:
+				out <- t
+			}
+		}
+	}()
+	return out
+}
+
+func main() {
+	c1 := printOut()
+	c2 := printOut()
+	c3 := join(c1, c2)
+
+	timeout := time.After(3 * time.Second)
+	for {
+		select {
+		case t := <-c3:
+			fmt.Println(t)
+		case <-timeout:
+			return
+		}
+	}
+}
diff --git a/concurrency/channel-mit-close/main.go b/concurrency/channel-mit-close/main.go
new file mode 100644
index 0000000..07329e0
--- /dev/null
+++ b/concurrency/channel-mit-close/main.go
@@ -0,0 +1,31 @@
+package main
+
+import (
+	"fmt"
+	"math/rand"
+	"time"
+)
+
+var c chan string
+
+func printOut() {
+	for i := 1; i < 10; i++ {
+		c <- fmt.Sprintf("Print %v", i)
+		time.Sleep(time.Duration(rand.Intn(500)) * time.Millisecond)
+	}
+	close(c)
+}
+
+func main() {
+	c = make(chan string)
+	go printOut()
+
+	for {
+		t, open := <-c
+		if open {
+			fmt.Println(t)
+		} else {
+			break
+		}
+	}
+}
diff --git a/concurrency/channel-range/main.go b/concurrency/channel-range/main.go
new file mode 100644
index 0000000..6e7385d
--- /dev/null
+++ b/concurrency/channel-range/main.go
@@ -0,0 +1,25 @@
+package main
+
+import (
+	"fmt"
+	"math/rand"
+	"time"
+)
+
+var c chan string
+
+func printOut() {
+	for i := 1; i < 10; i++ {
+		c <- fmt.Sprintf("Print %v", i)
+		time.Sleep(time.Duration(rand.Intn(500)) * time.Millisecond)
+	}
+	close(c)
+}
+
+func main() {
+	c = make(chan string)
+	go printOut()
+	for t := range c {
+		fmt.Println(t)
+	}
+}
diff --git a/concurrency/channels/main.go b/concurrency/channels/main.go
new file mode 100644
index 0000000..27230d3
--- /dev/null
+++ b/concurrency/channels/main.go
@@ -0,0 +1,17 @@
+package main
+
+import "fmt"
+
+func main() {
+
+	c := make(chan string)
+
+	go func() {
+		fmt.Println(<-c)
+	}()
+
+	c <- "Hello World!"
+
+	close(c)
+
+}
diff --git a/concurrency/first-go-routine-mit-channel/main.go b/concurrency/first-go-routine-mit-channel/main.go
new file mode 100644
index 0000000..483159c
--- /dev/null
+++ b/concurrency/first-go-routine-mit-channel/main.go
@@ -0,0 +1,24 @@
+package main
+
+import (
+	"fmt"
+	"math/rand"
+	"time"
+)
+
+var c chan string
+
+func printOut() {
+	for i := 1; ; i++ {
+		c <- fmt.Sprintf("Print %v", i)
+		time.Sleep(time.Duration(rand.Intn(500)) * time.Millisecond)
+	}
+}
+
+func main() {
+	c = make(chan string)
+	go printOut()
+	for i := 0; i < 10; i++ {
+		fmt.Println(<-c)
+	}
+}
diff --git a/concurrency/first-go-routine/main.go b/concurrency/first-go-routine/main.go
new file mode 100644
index 0000000..b77a502
--- /dev/null
+++ b/concurrency/first-go-routine/main.go
@@ -0,0 +1,19 @@
+package main
+
+import (
+	"fmt"
+	"math/rand"
+	"time"
+)
+
+func printOut() {
+	for i := 0; i < 10; i++ {
+		fmt.Printf("Print %v\n", i)
+		time.Sleep(time.Duration(rand.Intn(500)) * time.Millisecond)
+	}
+}
+
+func main() {
+	go printOut()
+	time.Sleep(5 * time.Second)
+}
diff --git a/concurrency/graceful-shutdown/.vscode/settings.json b/concurrency/graceful-shutdown/.vscode/settings.json
new file mode 100644
index 0000000..8c45cda
--- /dev/null
+++ b/concurrency/graceful-shutdown/.vscode/settings.json
@@ -0,0 +1,3 @@
+{
+    "go.formatTool": "goimports"
+}
\ No newline at end of file
diff --git a/concurrency/graceful-shutdown/go.mod b/concurrency/graceful-shutdown/go.mod
new file mode 100644
index 0000000..d5aca28
--- /dev/null
+++ b/concurrency/graceful-shutdown/go.mod
@@ -0,0 +1,3 @@
+module graceful-shutdown
+
+go 1.12
diff --git a/concurrency/graceful-shutdown/main.go b/concurrency/graceful-shutdown/main.go
new file mode 100644
index 0000000..8776c80
--- /dev/null
+++ b/concurrency/graceful-shutdown/main.go
@@ -0,0 +1,60 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"log"
+	"net/http"
+	"os"
+	"os/signal"
+	"time"
+)
+
+func handle(w http.ResponseWriter, r *http.Request) {
+
+	select {
+	case <-time.After(60 * time.Second):
+		// If we receive a message after 2 seconds
+		// that means the request has been processed
+		// We then write this as the response
+		w.Write([]byte("request processed"))
+	case <-r.Context().Done():
+		// If the request gets cancelled, log it
+		// to STDERR
+		fmt.Fprint(os.Stderr, "request cancelled\n")
+	}
+
+}
+
+func main() {
+
+	srv := http.Server{Addr: ":8081"}
+
+	idleConnsClosed := make(chan struct{})
+
+	ctx, cancel := context.WithTimeout(context.Background(), 100*time.Second)
+	defer cancel()
+
+	go func() {
+		sigint := make(chan os.Signal, 1)
+		signal.Notify(sigint, os.Interrupt)
+		<-sigint
+		// We received an interrupt signal, shut down.
+		if err := srv.Shutdown(ctx); err != nil {
+			// Error from closing listeners, or context timeout:
+			log.Printf("HTTP server Shutdown: %v", err)
+		}
+		log.Print("HTTP server Shutdown successful")
+		close(idleConnsClosed)
+	}()
+
+	http.HandleFunc("/", handle)
+
+	if err := srv.ListenAndServe(); err != http.ErrServerClosed {
+		// Error starting or closing listener:
+		log.Printf("HTTP server ListenAndServe: %v", err)
+	}
+
+	<-idleConnsClosed
+
+}
diff --git a/concurrency/java-threads-beispiel/Main.java b/concurrency/java-threads-beispiel/Main.java
new file mode 100644
index 0000000..963b179
--- /dev/null
+++ b/concurrency/java-threads-beispiel/Main.java
@@ -0,0 +1,40 @@
+import java.util.concurrent.Semaphore;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+public class Main {
+
+	static int count = 0;
+
+	public static void main(String[] args) {
+
+		new Thread(new Runnable() {
+			@Override
+			public void run() {
+				while (true) {
+					count++;
+					try {
+						new Thread(new Runnable() {
+							@Override
+							public void run() {
+								while (true) {
+									try {
+										Thread.sleep(120000);
+									} catch (InterruptedException e) {
+										e.printStackTrace();
+									}
+									System.out.println("Thread Hello " + count);
+								}
+							}
+						}).start();
+					} catch (Throwable e) {
+						e.printStackTrace();
+						System.exit(1);
+					}
+					System.out.println("create native thread "+ count);
+				}
+			}
+		}).start();
+
+	}
+
+}
diff --git a/configuration/application-configuration-os/main.go b/configuration/application-configuration-os/main.go
new file mode 100644
index 0000000..f3bf44b
--- /dev/null
+++ b/configuration/application-configuration-os/main.go
@@ -0,0 +1,11 @@
+package main
+
+import (
+	"fmt"
+	"os"
+)
+
+func main() {
+	configValue := os.Getenv("HELLO")
+	fmt.Printf("Hello %v\n", configValue)
+}
diff --git a/configuration/application-configuration-viper/config.yml b/configuration/application-configuration-viper/config.yml
new file mode 100644
index 0000000..fab7553
--- /dev/null
+++ b/configuration/application-configuration-viper/config.yml
@@ -0,0 +1,2 @@
+server:
+    host: localhost
\ No newline at end of file
diff --git a/configuration/application-configuration-viper/go.mod b/configuration/application-configuration-viper/go.mod
new file mode 100644
index 0000000..e9726f8
--- /dev/null
+++ b/configuration/application-configuration-viper/go.mod
@@ -0,0 +1,8 @@
+module golang.source-fellows.com/samples/applicationconfiguration
+
+go 1.14
+
+require (
+	github.com/kelseyhightower/envconfig v1.4.0 // indirect
+	github.com/spf13/viper v1.7.0
+)
diff --git a/configuration/application-configuration-viper/go.sum b/configuration/application-configuration-viper/go.sum
new file mode 100644
index 0000000..cd8bd31
--- /dev/null
+++ b/configuration/application-configuration-viper/go.sum
@@ -0,0 +1,292 @@
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diff --git a/configuration/application-configuration-viper/main.go b/configuration/application-configuration-viper/main.go
new file mode 100644
index 0000000..696235f
--- /dev/null
+++ b/configuration/application-configuration-viper/main.go
@@ -0,0 +1,28 @@
+/*Package main show how to use viper.
+
+Start the app in the root folder with:
+
+	SERVER_HOST=testing go run cmd/main.go
+
+*/
+package main
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/spf13/viper"
+)
+
+func main() {
+	viper.SetConfigName("config")
+	viper.AddConfigPath(".")
+	err := viper.ReadInConfig()
+	if err != nil {
+		panic(fmt.Errorf("fatal error config file: %s", err))
+	}
+	replacer := strings.NewReplacer(".", "_")
+	viper.SetEnvKeyReplacer(replacer)
+	viper.AutomaticEnv()
+	fmt.Println(viper.Get("server.host"))
+}
diff --git a/configuration/application-configuration/cmd/main.go b/configuration/application-configuration/cmd/main.go
new file mode 100644
index 0000000..d2d7a75
--- /dev/null
+++ b/configuration/application-configuration/cmd/main.go
@@ -0,0 +1,28 @@
+/*Package main show how to use envconfig.
+
+Start the app in the root folder with:
+
+	SERVER_PORT=8080 SERVER_HOST=localhost go run cmd/main.go
+
+*/
+package main
+
+import (
+	"fmt"
+
+	"github.com/kelseyhightower/envconfig"
+	"golang.source-fellows.com/samples/applicationconfiguration"
+)
+
+func main() {
+
+	cfg := applicationconfiguration.Config{}
+	err := envconfig.Process("", &cfg)
+
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(cfg.Server.Port)
+
+}
diff --git a/configuration/application-configuration/configuration.go b/configuration/application-configuration/configuration.go
new file mode 100644
index 0000000..a59e3ad
--- /dev/null
+++ b/configuration/application-configuration/configuration.go
@@ -0,0 +1,12 @@
+package applicationconfiguration
+
+type Config struct {
+	Server struct {
+		Port string `envconfig:"SERVER_PORT" required:"true"`
+		Host string `envconfig:"SERVER_HOST" required:"true"`
+	}
+	Database struct {
+		Username string `envconfig:"DB_USERNAME"`
+		Password string `envconfig:"DB_PASSWORD"`
+	}
+}
diff --git a/configuration/application-configuration/go.mod b/configuration/application-configuration/go.mod
new file mode 100644
index 0000000..e5e7c0a
--- /dev/null
+++ b/configuration/application-configuration/go.mod
@@ -0,0 +1,5 @@
+module golang.source-fellows.com/samples/applicationconfiguration
+
+go 1.14
+
+require github.com/kelseyhightower/envconfig v1.4.0 // indirect
diff --git a/configuration/application-configuration/go.sum b/configuration/application-configuration/go.sum
new file mode 100644
index 0000000..8642a1a
--- /dev/null
+++ b/configuration/application-configuration/go.sum
@@ -0,0 +1,2 @@
+github.com/kelseyhightower/envconfig v1.4.0 h1:Im6hONhd3pLkfDFsbRgu68RDNkGF1r3dvMUtDTo2cv8=
+github.com/kelseyhightower/envconfig v1.4.0/go.mod h1:cccZRl6mQpaq41TPp5QxidR+Sa3axMbJDNb//FQX6Gg=
diff --git a/first-module-dependency/cmd/main.go b/first-module-dependency/cmd/main.go
new file mode 100644
index 0000000..fd8faff
--- /dev/null
+++ b/first-module-dependency/cmd/main.go
@@ -0,0 +1,9 @@
+package main
+
+import (
+	"golang.source-fellows.com/training/sample"
+)
+
+func main() {
+	sample.Hello()
+}
diff --git a/first-module-dependency/go.mod b/first-module-dependency/go.mod
new file mode 100644
index 0000000..5c3ff4d
--- /dev/null
+++ b/first-module-dependency/go.mod
@@ -0,0 +1,5 @@
+module golang.source-fellows.com/training/sample
+
+go 1.13
+
+require github.com/sirupsen/logrus v1.5.0
diff --git a/first-module-dependency/go.sum b/first-module-dependency/go.sum
new file mode 100644
index 0000000..129248e
--- /dev/null
+++ b/first-module-dependency/go.sum
@@ -0,0 +1,9 @@
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/konsorten/go-windows-terminal-sequences v1.0.1 h1:mweAR1A6xJ3oS2pRaGiHgQ4OO8tzTaLawm8vnODuwDk=
+github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/sirupsen/logrus v1.5.0 h1:1N5EYkVAPEywqZRJd7cwnRtCb6xJx7NH3T3WUTF980Q=
+github.com/sirupsen/logrus v1.5.0/go.mod h1:+F7Ogzej0PZc/94MaYx/nvG9jOFMD2osvC3s+Squfpo=
+github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
+golang.org/x/sys v0.0.0-20190422165155-953cdadca894 h1:Cz4ceDQGXuKRnVBDTS23GTn/pU5OE2C0WrNTOYK1Uuc=
+golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
diff --git a/first-module-dependency/main.go b/first-module-dependency/main.go
new file mode 100644
index 0000000..7dbfad2
--- /dev/null
+++ b/first-module-dependency/main.go
@@ -0,0 +1,7 @@
+package sample
+
+import log "github.com/sirupsen/logrus"
+
+func Hello() {
+	log.Println("Hello World")
+}
diff --git a/golang-language-samples/collection-array-slice/collection.go b/golang-language-samples/collection-array-slice/collection.go
new file mode 100644
index 0000000..85593a0
--- /dev/null
+++ b/golang-language-samples/collection-array-slice/collection.go
@@ -0,0 +1,25 @@
+package main
+
+import "fmt"
+
+func main() {
+
+	//Array mit fester Größe
+	var months = [12]string{"Januar",
+		"Februar", "März", "April",
+		"Mai", "Juni", "Juli", "August",
+		"September", "Oktober", "November",
+		"Dezember"}
+
+	//Slices mit immer 3 Elementen des Arrays
+	q1 := months[:3]
+	q2 := months[3:6]
+	q3 := months[6:9]
+	q4 := months[9:12]
+	//Liefert "[Januar februar März]"
+	fmt.Println(q1)
+	fmt.Println(q2)
+	fmt.Println(q3)
+	fmt.Println(q4)
+
+}
diff --git a/golang-language-samples/collection-array/collection.go b/golang-language-samples/collection-array/collection.go
new file mode 100644
index 0000000..55f3ade
--- /dev/null
+++ b/golang-language-samples/collection-array/collection.go
@@ -0,0 +1,19 @@
+package main
+
+import "fmt"
+
+func main() {
+	//Initialisierung eines leeren Arrays
+	var str1 [3]string
+	//Befüllung durch Zuweisungen
+	str1[0] = "Hello"
+	str1[1] = "World"
+	str1[2] = "!"
+	fmt.Println(str1[0])
+	fmt.Println(len(str1))
+
+	//Initialsierung mit direkter Befüllung
+	var str2 = [3]string{"Hello", "World", "!"}
+	fmt.Println(str2[0])
+	fmt.Println(len(str2))
+}
diff --git a/golang-language-samples/collection-capa/collection.go b/golang-language-samples/collection-capa/collection.go
new file mode 100644
index 0000000..48c1d36
--- /dev/null
+++ b/golang-language-samples/collection-capa/collection.go
@@ -0,0 +1,25 @@
+package main
+
+import "fmt"
+
+func main() {
+
+	//Array mit fester Größe
+	var months = [12]string{"Januar",
+		"Februar", "März", "April",
+		"Mai", "Juni", "Juli", "August",
+		"September", "Oktober", "November",
+		"Dezember"}
+
+	//Slices mit immer 3 Elementen des Arrays
+	q1 := months[:3]
+	q2 := months[3:6]
+	q3 := months[6:9]
+	q4 := months[9:12]
+
+	fmt.Printf("Length %v, Capa %v, Values: %v\n", len(q1), cap(q1), q1)
+	fmt.Printf("Length %v, Capa %v, Values: %v\n", len(q2), cap(q2), q2)
+	fmt.Printf("Length %v, Capa %v, Values: %v\n", len(q3), cap(q3), q3)
+	fmt.Printf("Length %v, Capa %v, Values: %v\n", len(q4), cap(q4), q4)
+
+}
diff --git a/golang-language-samples/collection-for-range/collection.go b/golang-language-samples/collection-for-range/collection.go
new file mode 100644
index 0000000..d49697e
--- /dev/null
+++ b/golang-language-samples/collection-for-range/collection.go
@@ -0,0 +1,22 @@
+package main
+
+import "fmt"
+
+func main() {
+
+	//Array mit fester Größe
+	var months = [12]string{"Januar",
+		"Februar", "März", "April",
+		"Mai", "Juni", "Juli", "August",
+		"September", "Oktober", "November",
+		"Dezember"}
+	for i, month := range months {
+		fmt.Printf("%v: %v\n", i, month)
+	}
+
+	q2 := months[3:6]
+	for i, month := range q2 {
+		fmt.Printf("%v: %v\n", i, month)
+	}
+
+}
diff --git a/golang-language-samples/defer-file-open/defer.go b/golang-language-samples/defer-file-open/defer.go
new file mode 100644
index 0000000..2d06dc4
--- /dev/null
+++ b/golang-language-samples/defer-file-open/defer.go
@@ -0,0 +1,22 @@
+package main
+
+import (
+	"log"
+	"os"
+)
+
+func main() {
+
+	f, err := os.Open("testfile")
+	if err != nil {
+		log.Fatalf("Konnte die Datei nicht öffnen: %v", err)
+	}
+	defer f.Close()
+
+	f2, err := os.Open("nichtVorhanden")
+	if err != nil {
+		log.Fatalf("Konnte die Datei nicht öffnen: %v", err)
+	}
+	defer f2.Close()
+	//Arbeit mit den Dateien
+}
diff --git a/golang-language-samples/defer-file-open/testfile b/golang-language-samples/defer-file-open/testfile
new file mode 100644
index 0000000..e69de29
diff --git a/golang-language-samples/defer-lock/defer.go b/golang-language-samples/defer-lock/defer.go
new file mode 100644
index 0000000..9d6acf3
--- /dev/null
+++ b/golang-language-samples/defer-lock/defer.go
@@ -0,0 +1,23 @@
+package main
+
+import (
+	"fmt"
+	"sync"
+)
+
+var lock sync.Mutex
+
+func wasWichtiges() {
+	lock.Lock()
+	defer lock.Unlock()
+	//auf ressourcen zugreifen
+	fmt.Println("Arbeit an gesperrter Ressource")
+}
+
+func main() {
+
+	wasWichtiges()
+	lock.Lock()
+	fmt.Println("am Ende")
+
+}
diff --git a/golang-language-samples/defer/defer.go b/golang-language-samples/defer/defer.go
new file mode 100644
index 0000000..2767752
--- /dev/null
+++ b/golang-language-samples/defer/defer.go
@@ -0,0 +1,16 @@
+package main
+
+import "fmt"
+
+func sagA() {
+	fmt.Println("A")
+}
+
+func sagB() {
+	fmt.Println("B")
+}
+
+func main() {
+	defer sagA()
+	sagB()
+}
diff --git a/golang-language-samples/errors-new/errors.go b/golang-language-samples/errors-new/errors.go
new file mode 100644
index 0000000..e8ec1db
--- /dev/null
+++ b/golang-language-samples/errors-new/errors.go
@@ -0,0 +1,29 @@
+package main
+
+import (
+	"errors"
+	"fmt"
+)
+
+func erzeugeEinenNeuenFehler(i int) error {
+	if i != 42 {
+		return fmt.Errorf("Mit %v lösen Sie das Problem nicht", i)
+	}
+	return nil
+}
+
+func erzeugeNochEinenFehler() error {
+	return errors.New("Da ist noch ein Problem")
+}
+
+func main() {
+	err := erzeugeEinenNeuenFehler(13)
+	if err != nil {
+		fmt.Printf("Es ist ein Fehler aufgetreten: %v\n", err)
+	}
+	err = erzeugeNochEinenFehler()
+	if err != nil {
+		fmt.Printf("Es ist ein Fehler aufgetreten: %v\n", err)
+	}
+
+}
diff --git a/golang-language-samples/errors-owntyp-wrap/errors.go b/golang-language-samples/errors-owntyp-wrap/errors.go
new file mode 100644
index 0000000..2016956
--- /dev/null
+++ b/golang-language-samples/errors-owntyp-wrap/errors.go
@@ -0,0 +1,49 @@
+package main
+
+import (
+	"errors"
+	"fmt"
+	"log"
+)
+
+var PermissionError = errors.New("keine Berechtigung")
+
+//StatementExecutionError ist ein eigener Fehlertyp
+//mit zusätzlicher Information
+type StatementExecutionError struct {
+	Statement string
+	Message   string
+	Cause     error
+}
+
+func (wse *StatementExecutionError) Unwrap() error {
+	return wse.Cause
+}
+
+//Implementierung der Error Methode des error Interface
+func (wse *StatementExecutionError) Error() string {
+	return wse.Message
+}
+
+func fuehreStatementAus(statement string) error {
+	if statement != "1=1" {
+		return &StatementExecutionError{
+			Statement: statement,
+			Message:   "Statement kann nicht ausgeführt werden",
+			Cause:     PermissionError,
+		}
+	}
+	return nil
+}
+
+func main() {
+	err := fuehreStatementAus("v:=b")
+	//Prüfung über errors Package
+	if errors.Is(err, PermissionError) {
+		log.Fatal("Das Statement konnte nicht ausgeführt werden.")
+	} else {
+		fmt.Println("alles ok")
+	}
+
+	panic("")
+}
diff --git a/golang-language-samples/errors-owntyp/errors.go b/golang-language-samples/errors-owntyp/errors.go
new file mode 100644
index 0000000..c898f49
--- /dev/null
+++ b/golang-language-samples/errors-owntyp/errors.go
@@ -0,0 +1,38 @@
+package main
+
+import (
+	"fmt"
+	"log"
+)
+
+//StatementExecutionError ist ein eigener Fehlertyp
+//mit zusätzlicher Information
+type StatementExecutionError struct {
+	Statement string
+	Message   string
+}
+
+//Implementierung der Error Methode des error Interface
+func (wse *StatementExecutionError) Error() string {
+	return wse.Message
+}
+
+func fuehreStatementAus(statement string) error {
+	if statement != "1=1" {
+		return &StatementExecutionError{
+			Statement: statement,
+			Message:   "Statement kann nicht ausgeführt werden",
+		}
+	}
+	return nil
+}
+
+func main() {
+	err := fuehreStatementAus("v:=b")
+	//Prüfung über Simple-Statement mit Type-Assertion
+	if e, ok := err.(*StatementExecutionError); ok {
+		log.Fatalf("Das Statement '%v' konnte nicht ausgeführt werden.", e.Statement)
+	} else {
+		fmt.Println("alles ok")
+	}
+}
diff --git a/golang-language-samples/errors/errors.go b/golang-language-samples/errors/errors.go
new file mode 100644
index 0000000..1eaecc7
--- /dev/null
+++ b/golang-language-samples/errors/errors.go
@@ -0,0 +1,16 @@
+package main
+
+import (
+	"log"
+	"os"
+)
+
+func main() {
+	f, err := os.Open("datei-ist-nicht-da.txt")
+	if err != nil {
+		//Durch den Aufruf von log.Fatalf wird die weitere
+		// Verarbeitung abgebrochen und die Anwendung beendet
+		log.Fatalf("Konnte die Datei nicht öffnen, da %v", err)
+	}
+	f.Close()
+}
diff --git a/golang-language-samples/for-range/main.go b/golang-language-samples/for-range/main.go
new file mode 100644
index 0000000..803b4d3
--- /dev/null
+++ b/golang-language-samples/for-range/main.go
@@ -0,0 +1,19 @@
+package main
+
+import "fmt"
+
+func main() {
+
+	text := "Hello"
+
+	//Nur Zuweisung des Index
+	for v := range text {
+		fmt.Print(v)
+	}
+
+	//Zuweisung von Index und Wert
+	for i, v := range text {
+		fmt.Printf("index %d value %c\n", i, v)
+	}
+
+}
diff --git a/golang-language-samples/pointer-parameter/pointer.go b/golang-language-samples/pointer-parameter/pointer.go
new file mode 100644
index 0000000..16c8128
--- /dev/null
+++ b/golang-language-samples/pointer-parameter/pointer.go
@@ -0,0 +1,20 @@
+package main
+
+import "fmt"
+
+type Person struct {
+	Name string
+}
+
+func sayHello(p interface{}) {
+	t, ok := p.(*Person)
+	fmt.Println(t)
+	fmt.Println(ok)
+}
+
+func main() {
+
+	p := &Person{"Kristian"}
+	sayHello(p)
+
+}
diff --git a/golang-language-samples/pointer-receiver/pointer.go b/golang-language-samples/pointer-receiver/pointer.go
new file mode 100644
index 0000000..ef73928
--- /dev/null
+++ b/golang-language-samples/pointer-receiver/pointer.go
@@ -0,0 +1,23 @@
+package main
+
+import (
+	"fmt"
+)
+
+type Person struct {
+	alter int
+}
+
+func (p *Person) Alter() int {
+	return p.alter
+}
+
+func (p *Person) GeburtstagFeiern() {
+	p.alter = p.alter + 1
+}
+
+func main() {
+	p := Person{5}
+	p.GeburtstagFeiern()
+	fmt.Println(p.Alter())
+}
diff --git a/golang-language-samples/pointer-struct/pointer.go b/golang-language-samples/pointer-struct/pointer.go
new file mode 100644
index 0000000..fc7ff7e
--- /dev/null
+++ b/golang-language-samples/pointer-struct/pointer.go
@@ -0,0 +1,14 @@
+package main
+
+import "fmt"
+
+type Person struct {
+	Name string
+}
+
+func main() {
+	p := &Person{}
+	p.Name = "Kristian"
+	(*p).Name = "Kristian" //beide Zeilen sind gleichbedeutend
+	fmt.Println(p)
+}
diff --git a/golang-language-samples/pointer/pointer.go b/golang-language-samples/pointer/pointer.go
new file mode 100644
index 0000000..cd8b8bf
--- /dev/null
+++ b/golang-language-samples/pointer/pointer.go
@@ -0,0 +1,15 @@
+package main
+
+import "fmt"
+
+func main() {
+
+	var month = "Januar"
+	//Erstellt einen Pointer auf die Variable month
+	var monthPtr = &month
+	//Ändern den Wert von month über den Pointer monthPtr
+	*monthPtr = "Februar"
+
+	fmt.Println(month)
+
+}
diff --git a/golang-language-samples/sampledoc/first.go b/golang-language-samples/sampledoc/first.go
new file mode 100644
index 0000000..2528252
--- /dev/null
+++ b/golang-language-samples/sampledoc/first.go
@@ -0,0 +1,7 @@
+//Package sampledoc zeigt wie man Integer Werte addiert.
+package sampledoc
+
+//Add addiert zwei Integer Werte und liefert das Ergebnis.
+func Add(first int, second int) int {
+	return first + second
+}
diff --git a/golang-language-samples/sampledoc/first_example_test.go b/golang-language-samples/sampledoc/first_example_test.go
new file mode 100644
index 0000000..0e7e69a
--- /dev/null
+++ b/golang-language-samples/sampledoc/first_example_test.go
@@ -0,0 +1,12 @@
+package sampledoc
+
+import "fmt"
+
+func ExampleAdd() {
+
+	res := Add(1, 2)
+	fmt.Println(res)
+
+	//Output: 3
+
+}
diff --git a/golang-language-samples/switch-case-falltrough/switch-case.go b/golang-language-samples/switch-case-falltrough/switch-case.go
new file mode 100644
index 0000000..058fc78
--- /dev/null
+++ b/golang-language-samples/switch-case-falltrough/switch-case.go
@@ -0,0 +1,24 @@
+package main
+
+import "fmt"
+
+func main() {
+
+	val := 2
+	var erg int
+
+	switch {
+	case val == 2:
+		erg = val * 2
+		fallthrough
+	case val < 10:
+		erg = erg * 2
+	case val < 100:
+		erg = erg * 3
+	default:
+		erg = 1
+	}
+
+	fmt.Println(erg)
+
+}
diff --git a/golang-language-samples/switch-case-no-expression/switch-case.go b/golang-language-samples/switch-case-no-expression/switch-case.go
new file mode 100644
index 0000000..29fe844
--- /dev/null
+++ b/golang-language-samples/switch-case-no-expression/switch-case.go
@@ -0,0 +1,18 @@
+package main
+
+import "fmt"
+
+func main() {
+
+	val := 2 * 5
+
+	switch {
+	case val == 10:
+		fmt.Println("10!")
+	case val < 10:
+		fmt.Println("kleiner 10")
+	default:
+		fmt.Println("größer 10")
+	}
+
+}
diff --git a/golang-language-samples/switch-case/switch-case.go b/golang-language-samples/switch-case/switch-case.go
new file mode 100644
index 0000000..ba1ed14
--- /dev/null
+++ b/golang-language-samples/switch-case/switch-case.go
@@ -0,0 +1,18 @@
+package main
+
+import "fmt"
+
+func main() {
+
+	val := 2 * 6
+
+	switch val {
+	case 10:
+		fmt.Println("10!")
+	case 1, 2, 3, 4, 5, 6, 7, 8, 9:
+		fmt.Println("kleiner 10")
+	default:
+		fmt.Println("größer 10")
+	}
+
+}
diff --git a/golang-language-samples/type-alias-definition/type-definition.go b/golang-language-samples/type-alias-definition/type-definition.go
new file mode 100644
index 0000000..3676a14
--- /dev/null
+++ b/golang-language-samples/type-alias-definition/type-definition.go
@@ -0,0 +1,13 @@
+package main
+
+import "fmt"
+
+type (
+	A1 = string // A1 und string bezeichen identische Typen
+	A2 = A1     // A2 und A1 bezeichen identische Typen
+)
+
+func main() {
+	var text A2
+	fmt.Println(text)
+}
diff --git a/golang-language-samples/type-definition-assertion/type-definition.go b/golang-language-samples/type-definition-assertion/type-definition.go
new file mode 100644
index 0000000..e558969
--- /dev/null
+++ b/golang-language-samples/type-definition-assertion/type-definition.go
@@ -0,0 +1,24 @@
+package main
+
+import "fmt"
+
+func main() {
+	//Variable muss ein Interfacetyp sein
+	var i interface{} = "hello"
+
+	//direkte Zuweisung ohne Prüfung
+	s := i.(string)
+	fmt.Println(s)
+
+	//Zuweisung mit Prüfung ob möglich
+	s, ok := i.(string)
+	fmt.Println(s, ok)
+
+	//Zuweisung mit Prüfung ob möglich
+	f, ok := i.(int)
+	fmt.Println(f, ok)
+
+	//Zuweisung ohne Prüfung führt zu Panic
+	f = i.(int)
+	fmt.Println(f)
+}
diff --git a/golang-language-samples/type-definition-interface-receiver/type-definition.go b/golang-language-samples/type-definition-interface-receiver/type-definition.go
new file mode 100644
index 0000000..2a4733f
--- /dev/null
+++ b/golang-language-samples/type-definition-interface-receiver/type-definition.go
@@ -0,0 +1,21 @@
+package main
+
+import "fmt"
+
+type Dog interface {
+	Bark()
+}
+
+type Dackel struct {
+	name string
+}
+
+func (d Dackel) Bark() {
+	fmt.Printf("Wuff %v\n", d.name)
+}
+
+func main() {
+	var d Dog
+	d = Dackel{"Heino"}
+	d.Bark()
+}
diff --git a/golang-language-samples/type-definition-interface/type-definition.go b/golang-language-samples/type-definition-interface/type-definition.go
new file mode 100644
index 0000000..6111cca
--- /dev/null
+++ b/golang-language-samples/type-definition-interface/type-definition.go
@@ -0,0 +1,16 @@
+package main
+
+import "fmt"
+
+type File interface {
+	Read([]byte) (int, error)
+	Write([]byte) (int, error)
+	Close() error
+}
+
+func main() {
+
+	var f File
+	fmt.Println(f)
+
+}
diff --git a/golang-language-samples/type-definition-struct/type-definition.go b/golang-language-samples/type-definition-struct/type-definition.go
new file mode 100644
index 0000000..efc3f56
--- /dev/null
+++ b/golang-language-samples/type-definition-struct/type-definition.go
@@ -0,0 +1,15 @@
+package main
+
+import "fmt"
+
+type Person struct {
+	vorname  string
+	nachname string
+}
+
+func main() {
+	p := Person{"Kristian", "Köhler"}
+	p2 := Person{nachname: "Köhler"}
+	fmt.Println(p.vorname)
+	fmt.Println(p2.nachname)
+}
diff --git a/golang-language-samples/type-definition-switch/type-definition.go b/golang-language-samples/type-definition-switch/type-definition.go
new file mode 100644
index 0000000..fc654be
--- /dev/null
+++ b/golang-language-samples/type-definition-switch/type-definition.go
@@ -0,0 +1,20 @@
+package main
+
+import "fmt"
+
+func checkMyType(i interface{}) {
+	switch i.(type) {
+	case string:
+		fmt.Println("Es ist ein string")
+	case int:
+		fmt.Println("Es ist ein int")
+	default:
+		fmt.Println("Es ist weder string noch int")
+	}
+}
+
+func main() {
+	checkMyType("Hello")
+	checkMyType(1)
+	checkMyType(3.4)
+}
diff --git a/golang-language-samples/type-definition/type-definition.go b/golang-language-samples/type-definition/type-definition.go
new file mode 100644
index 0000000..28595da
--- /dev/null
+++ b/golang-language-samples/type-definition/type-definition.go
@@ -0,0 +1,13 @@
+package main
+
+import "fmt"
+
+type (
+	Point struct{ x, y float64 }
+	polar Point
+)
+
+func main() {
+	var p Point
+	fmt.Println(p)
+}
diff --git a/golang-language-samples/type-failure/type-failure.go b/golang-language-samples/type-failure/type-failure.go
new file mode 100644
index 0000000..a96f04d
--- /dev/null
+++ b/golang-language-samples/type-failure/type-failure.go
@@ -0,0 +1,11 @@
+package main
+
+import "fmt"
+
+func main() {
+
+	var i int = "Hello"
+
+	fmt.Println(i)
+
+}
diff --git a/hello-channel-post/main.go b/hello-channel-post/main.go
new file mode 100644
index 0000000..c17035a
--- /dev/null
+++ b/hello-channel-post/main.go
@@ -0,0 +1,19 @@
+package main
+
+import "fmt"
+
+func f(left, right chan int) {
+	left <- 1 + <-right
+}
+
+func main() {
+	leftmost := make(chan int)
+	var left, right chan int = nil, leftmost
+	for i := 0; i < 100000; i++ {
+		left, right = right, make(chan int)
+		go f(left, right)
+	}
+	right <- 0
+	x := <-leftmost
+	fmt.Println(x)
+}
diff --git a/hello-channel/main.go b/hello-channel/main.go
new file mode 100644
index 0000000..ec1e268
--- /dev/null
+++ b/hello-channel/main.go
@@ -0,0 +1,11 @@
+package main
+
+import "fmt"
+
+func main() {
+	c := make(chan string)
+	//Wert in Channel schreiben
+	c <- "Hello World"
+	//Wert aus Channel lesen
+	fmt.Println(<-c)
+}
diff --git a/hello-go-channel/main.go b/hello-go-channel/main.go
new file mode 100644
index 0000000..66c1488
--- /dev/null
+++ b/hello-go-channel/main.go
@@ -0,0 +1,20 @@
+package main
+
+import (
+	"fmt"
+)
+
+func sayHello(c chan string) {
+	fmt.Println("vor")
+	c <- "Hello World"
+	fmt.Println("nach")
+}
+
+func main() {
+	c := make(chan string)
+	go sayHello(c)
+	fmt.Println("vor2")
+	text := <-c
+	fmt.Println("nach2")
+	fmt.Println(text)
+}
diff --git a/hello-interface/main.go b/hello-interface/main.go
new file mode 100644
index 0000000..b6039ed
--- /dev/null
+++ b/hello-interface/main.go
@@ -0,0 +1,27 @@
+package main
+
+import "fmt"
+
+type QuasselStrippe interface {
+	Quassel()
+}
+
+type Person struct {
+	name string
+}
+
+func (p *Person) Quassel() {
+	fmt.Printf("Hi. Meine Name ist %s\n", p.name)
+}
+
+func VielQuasseln(qs QuasselStrippe) {
+	for i := 0; i < 3; i++ {
+		qs.Quassel()
+	}
+}
+
+func main() {
+	s := &Person{name: "Quassel-Philip"}
+	s.Quassel()
+	VielQuasseln(s)
+}
diff --git a/hello-world/cplusplus/README.txt b/hello-world/cplusplus/README.txt
new file mode 100644
index 0000000..8b0dd8c
--- /dev/null
+++ b/hello-world/cplusplus/README.txt
@@ -0,0 +1,12 @@
+Starten des docker Containers
+-----------------------------
+
+```
+docker run -v `pwd`:/tmp -it gcc:latest /bin/bash
+```
+
+Danach im Container
+```
+cd /tmp
+time g++ hello.cpp
+```
diff --git a/hello-world/cplusplus/a.out b/hello-world/cplusplus/a.out
new file mode 100755
index 0000000..08c963e
Binary files /dev/null and b/hello-world/cplusplus/a.out differ
diff --git a/hello-world/cplusplus/hello.cpp b/hello-world/cplusplus/hello.cpp
new file mode 100644
index 0000000..4706104
--- /dev/null
+++ b/hello-world/cplusplus/hello.cpp
@@ -0,0 +1,6 @@
+#include <iostream>
+
+int main() {
+  std::cout << "Hello World!";
+  return 0;
+}
\ No newline at end of file
diff --git a/hello-world/go/README.txt b/hello-world/go/README.txt
new file mode 100644
index 0000000..3007a60
--- /dev/null
+++ b/hello-world/go/README.txt
@@ -0,0 +1,12 @@
+Starten des docker Containers
+-----------------------------
+
+```
+docker run -v `pwd`:/tmp -it golang:latest /bin/bash
+```
+
+Danach im Container
+```
+cd /tmp
+time go build main.go
+```
diff --git a/hello-world/go/main.go b/hello-world/go/main.go
new file mode 100644
index 0000000..078ddff
--- /dev/null
+++ b/hello-world/go/main.go
@@ -0,0 +1,7 @@
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Println("Hello, 世界")
+}
diff --git a/hello-world/java/Main.java b/hello-world/java/Main.java
new file mode 100644
index 0000000..cabd861
--- /dev/null
+++ b/hello-world/java/Main.java
@@ -0,0 +1,7 @@
+
+
+public class Main {
+    public static void main(String[] args) {
+        System.out.println("Hello World");
+    }
+}
diff --git a/hello-world/java/README.txt b/hello-world/java/README.txt
new file mode 100644
index 0000000..5955271
--- /dev/null
+++ b/hello-world/java/README.txt
@@ -0,0 +1,12 @@
+Starten des docker Containers
+-----------------------------
+
+```
+docker run -v `pwd`:/tmp -it openjdk:latest /bin/bash
+```
+
+Danach im Container
+```
+cd /tmp
+time javac Main.java
+```
\ No newline at end of file
diff --git a/hello-world/javascript/README.txt b/hello-world/javascript/README.txt
new file mode 100644
index 0000000..bf3eb06
--- /dev/null
+++ b/hello-world/javascript/README.txt
@@ -0,0 +1,12 @@
+Starten des docker Containers
+-----------------------------
+
+```
+docker run -v `pwd`:/tmp -it node:latest /bin/bash
+```
+
+Danach im Containers
+```
+cd /tmp
+node index.js
+```
\ No newline at end of file
diff --git a/hello-world/javascript/index.js b/hello-world/javascript/index.js
new file mode 100644
index 0000000..b8c57fe
--- /dev/null
+++ b/hello-world/javascript/index.js
@@ -0,0 +1 @@
+console.log("Hello World")
\ No newline at end of file
diff --git a/hello-world/python/README.txt b/hello-world/python/README.txt
new file mode 100644
index 0000000..80537b5
--- /dev/null
+++ b/hello-world/python/README.txt
@@ -0,0 +1,12 @@
+Starten des docker Containers
+-----------------------------
+
+```
+docker run -v `pwd`:/tmp -it python:latest /bin/bash
+```
+
+Danach im Containers
+```
+cd /tmp
+time python hello.py
+```
\ No newline at end of file
diff --git a/hello-world/python/hello.py b/hello-world/python/hello.py
new file mode 100644
index 0000000..8ad280d
--- /dev/null
+++ b/hello-world/python/hello.py
@@ -0,0 +1 @@
+print("Hello World.")
\ No newline at end of file
diff --git a/hello-world/typescript/README.txt b/hello-world/typescript/README.txt
new file mode 100644
index 0000000..58caa73
--- /dev/null
+++ b/hello-world/typescript/README.txt
@@ -0,0 +1,13 @@
+Starten des docker Containers
+-----------------------------
+
+```
+docker run -v `pwd`:/tmp -it node:latest /bin/bash
+```
+
+Danach im Container
+```
+npm install -g tsc
+cd /tmp
+time tsc hello.ts
+```
diff --git a/hello-world/typescript/hello.js b/hello-world/typescript/hello.js
new file mode 100644
index 0000000..9ad1fd7
--- /dev/null
+++ b/hello-world/typescript/hello.js
@@ -0,0 +1,5 @@
+function greeter(person) {
+    return "Hello, " + person;
+}
+var user = "Jane User";
+console.log(greeter(user));
diff --git a/hello-world/typescript/hello.ts b/hello-world/typescript/hello.ts
new file mode 100644
index 0000000..37e6674
--- /dev/null
+++ b/hello-world/typescript/hello.ts
@@ -0,0 +1,7 @@
+function greeter(person) {
+    return "Hello, " + person;
+}
+
+let user = "Jane User";
+
+console.log(greeter(user));
\ No newline at end of file
diff --git a/library-dependency/go.mod b/library-dependency/go.mod
new file mode 100644
index 0000000..e9882fc
--- /dev/null
+++ b/library-dependency/go.mod
@@ -0,0 +1,5 @@
+module library-dependency
+
+go 1.13
+
+require github.com/SourceFellows/somelib v0.0.2
diff --git a/library-dependency/go.sum b/library-dependency/go.sum
new file mode 100644
index 0000000..322cadf
--- /dev/null
+++ b/library-dependency/go.sum
@@ -0,0 +1,2 @@
+github.com/SourceFellows/somelib v0.0.2 h1:mRbh02CVY098DPnLaTGeBeeCfYkoBY8U2v3ZJk/Zyvo=
+github.com/SourceFellows/somelib v0.0.2/go.mod h1:acrwWUtWlfzG22eWIsriyO+Qu6it2dIHQZO21HFpRwY=
diff --git a/library-dependency/main.go b/library-dependency/main.go
new file mode 100644
index 0000000..b7270d9
--- /dev/null
+++ b/library-dependency/main.go
@@ -0,0 +1,9 @@
+package main
+
+import "github.com/SourceFellows/somelib"
+
+func main() {
+
+	somelib.CallLib()
+
+}
diff --git a/microservices/container/Dockerfile b/microservices/container/Dockerfile
new file mode 100644
index 0000000..4e671e5
--- /dev/null
+++ b/microservices/container/Dockerfile
@@ -0,0 +1,7 @@
+FROM golang:latest
+
+COPY main.go /app/main.go
+WORKDIR /app
+RUN go build main.go
+
+CMD [ "/app/main"]
\ No newline at end of file
diff --git a/microservices/container/README.md b/microservices/container/README.md
new file mode 100644
index 0000000..63028ab
--- /dev/null
+++ b/microservices/container/README.md
@@ -0,0 +1,6 @@
+# Ausführen
+
+```
+docker build -t microservice-buch .
+docker run  microservice-buch
+```
\ No newline at end of file
diff --git a/microservices/container/main.go b/microservices/container/main.go
new file mode 100644
index 0000000..b1b14d0
--- /dev/null
+++ b/microservices/container/main.go
@@ -0,0 +1,7 @@
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Println("Hello World!")
+}
diff --git a/microservices/default-mux-demo/main.go b/microservices/default-mux-demo/main.go
new file mode 100644
index 0000000..74e5a46
--- /dev/null
+++ b/microservices/default-mux-demo/main.go
@@ -0,0 +1,28 @@
+package main
+
+import "net/http"
+
+type myHandler struct {
+	Name string
+}
+
+func (h *myHandler) ServeHTTP(r http.ResponseWriter, _ *http.Request) {
+	r.Write([]byte(h.Name))
+}
+
+func main() {
+	handler1 := &myHandler{Name: "handler1"}
+	handler2 := &myHandler{Name: "handler2"}
+	handler3 := &myHandler{Name: "handler3"}
+	handler4 := &myHandler{Name: "handler4"}
+	handler5 := &myHandler{Name: "handler5"}
+	handler6 := &myHandler{Name: "handler6"}
+
+	http.Handle("/", handler1)
+	http.Handle("/book", handler2)
+	http.Handle("/books/", handler3)
+	http.Handle("/books/Hobbit", handler4)
+	http.Handle("/theme", handler5)
+	http.Handle("/theme/", handler6)
+	http.ListenAndServeTLS(":8080", nil)
+}
diff --git a/microservices/formrequest/Form-request.http b/microservices/formrequest/Form-request.http
new file mode 100644
index 0000000..885c2e5
--- /dev/null
+++ b/microservices/formrequest/Form-request.http
@@ -0,0 +1,4 @@
+POST http://localhost:8080/ HTTP/1.1
+Content-Type: application/x-www-form-urlencoded
+
+name=Peter
\ No newline at end of file
diff --git a/microservices/formrequest/go.mod b/microservices/formrequest/go.mod
new file mode 100644
index 0000000..38aad23
--- /dev/null
+++ b/microservices/formrequest/go.mod
@@ -0,0 +1,3 @@
+module golang.source-fellows.com/samples/formrequest
+
+go 1.13
diff --git a/microservices/formrequest/main.go b/microservices/formrequest/main.go
new file mode 100644
index 0000000..9c0fbca
--- /dev/null
+++ b/microservices/formrequest/main.go
@@ -0,0 +1,18 @@
+package main
+
+import "net/http"
+
+func handleForm(rw http.ResponseWriter, rq *http.Request) {
+	err := rq.ParseForm()
+	if err != nil {
+		rw.WriteHeader(http.StatusNotAcceptable)
+		return
+	}
+	name := rq.Form.Get("name")
+	rw.Write([]byte("Hello " + name))
+}
+
+func main() {
+	http.HandleFunc("/", handleForm)
+	http.ListenAndServe(":8080", nil)
+}
diff --git a/microservices/go-channel/main.go b/microservices/go-channel/main.go
new file mode 100644
index 0000000..a1ed456
--- /dev/null
+++ b/microservices/go-channel/main.go
@@ -0,0 +1,33 @@
+package main
+
+import (
+	"fmt"
+	"math/rand"
+	"time"
+)
+
+func main() {
+
+	tc := make(chan time.Time)
+
+	var c int64 = 0
+
+	go func() {
+		for {
+			go func() {
+				for {
+					c++
+					i := rand.Int31n(10)
+					time.Sleep(time.Duration(i) * time.Millisecond)
+					tc <- time.Now()
+				}
+			}()
+		}
+	}()
+
+	for t := range tc {
+		fmt.Println(t)
+		fmt.Println(c)
+	}
+
+}
diff --git a/microservices/gorilla-mux/go.mod b/microservices/gorilla-mux/go.mod
new file mode 100644
index 0000000..0124fe7
--- /dev/null
+++ b/microservices/gorilla-mux/go.mod
@@ -0,0 +1,5 @@
+module golang.source-fellows.com/samples/gorillamux
+
+go 1.13
+
+require github.com/gorilla/mux v1.7.4
diff --git a/microservices/gorilla-mux/go.sum b/microservices/gorilla-mux/go.sum
new file mode 100644
index 0000000..abb0613
--- /dev/null
+++ b/microservices/gorilla-mux/go.sum
@@ -0,0 +1,2 @@
+github.com/gorilla/mux v1.7.4 h1:VuZ8uybHlWmqV03+zRzdwKL4tUnIp1MAQtp1mIFE1bc=
+github.com/gorilla/mux v1.7.4/go.mod h1:DVbg23sWSpFRCP0SfiEN6jmj59UnW/n46BH5rLB71So=
diff --git a/microservices/gorilla-mux/main.go b/microservices/gorilla-mux/main.go
new file mode 100644
index 0000000..397dfa6
--- /dev/null
+++ b/microservices/gorilla-mux/main.go
@@ -0,0 +1,18 @@
+package main
+
+import (
+	"net/http"
+
+	"github.com/gorilla/mux"
+)
+
+func myFunc(rw http.ResponseWriter, rq *http.Request) {
+	rw.Write([]byte("Hello World"))
+}
+
+func main() {
+	r := mux.NewRouter()
+	r.PathPrefix("/").HandlerFunc(myFunc)
+	r.Methods("GET")
+	http.ListenAndServe(":8080", r)
+}
diff --git a/microservices/gorm-hooks/go.mod b/microservices/gorm-hooks/go.mod
new file mode 100644
index 0000000..0f19ba4
--- /dev/null
+++ b/microservices/gorm-hooks/go.mod
@@ -0,0 +1,8 @@
+module golang.source-fellows.com/samples/gorm
+
+go 1.14
+
+require (
+	github.com/Unknwon/log v0.0.0-20200308114134-929b1006e34a
+	github.com/jinzhu/gorm v1.9.14
+)
diff --git a/microservices/gorm-hooks/go.sum b/microservices/gorm-hooks/go.sum
new file mode 100644
index 0000000..f7bce9b
--- /dev/null
+++ b/microservices/gorm-hooks/go.sum
@@ -0,0 +1,27 @@
+github.com/PuerkitoBio/goquery v1.5.1/go.mod h1:GsLWisAFVj4WgDibEWF4pvYnkVQBpKBKeU+7zCJoLcc=
+github.com/Unknwon/log v0.0.0-20200308114134-929b1006e34a h1:2/IoPLpPzmKDdgAfM0aQVp71xVK5G/FKUqPWHQw5xp8=
+github.com/Unknwon/log v0.0.0-20200308114134-929b1006e34a/go.mod h1:/+ZenhmdkCX8gc8YHVQRSdVGE/+F9HvTY6QDTwEbaO4=
+github.com/andybalholm/cascadia v1.1.0/go.mod h1:GsXiBklL0woXo1j/WYWtSYYC4ouU9PqHO0sqidkEA4Y=
+github.com/denisenkom/go-mssqldb v0.0.0-20191124224453-732737034ffd/go.mod h1:xbL0rPBG9cCiLr28tMa8zpbdarY27NDyej4t/EjAShU=
+github.com/erikstmartin/go-testdb v0.0.0-20160219214506-8d10e4a1bae5/go.mod h1:a2zkGnVExMxdzMo3M0Hi/3sEU+cWnZpSni0O6/Yb/P0=
+github.com/go-sql-driver/mysql v1.5.0/go.mod h1:DCzpHaOWr8IXmIStZouvnhqoel9Qv2LBy8hT2VhHyBg=
+github.com/golang-sql/civil v0.0.0-20190719163853-cb61b32ac6fe/go.mod h1:8vg3r2VgvsThLBIFL93Qb5yWzgyZWhEmBwUJWevAkK0=
+github.com/jinzhu/gorm v1.9.14 h1:Kg3ShyTPcM6nzVo148fRrcMO6MNKuqtOUwnzqMgVniM=
+github.com/jinzhu/gorm v1.9.14/go.mod h1:G3LB3wezTOWM2ITLzPxEXgSkOXAntiLHS7UdBefADcs=
+github.com/jinzhu/inflection v1.0.0 h1:K317FqzuhWc8YvSVlFMCCUb36O/S9MCKRDI7QkRKD/E=
+github.com/jinzhu/inflection v1.0.0/go.mod h1:h+uFLlag+Qp1Va5pdKtLDYj+kHp5pxUVkryuEj+Srlc=
+github.com/jinzhu/now v1.0.1/go.mod h1:d3SSVoowX0Lcu0IBviAWJpolVfI5UJVZZ7cO71lE/z8=
+github.com/lib/pq v1.1.1/go.mod h1:5WUZQaWbwv1U+lTReE5YruASi9Al49XbQIvNi/34Woo=
+github.com/mattn/go-sqlite3 v1.14.0 h1:mLyGNKR8+Vv9CAU7PphKa2hkEqxxhn8i32J6FPj1/QA=
+github.com/mattn/go-sqlite3 v1.14.0/go.mod h1:JIl7NbARA7phWnGvh0LKTyg7S9BA+6gx71ShQilpsus=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20190325154230-a5d413f7728c/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20191205180655-e7c4368fe9dd/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
+golang.org/x/net v0.0.0-20180218175443-cbe0f9307d01/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/net v0.0.0-20200202094626-16171245cfb2/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20200324143707-d3edc9973b7e/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
diff --git a/microservices/gorm-hooks/main.go b/microservices/gorm-hooks/main.go
new file mode 100644
index 0000000..c5f1894
--- /dev/null
+++ b/microservices/gorm-hooks/main.go
@@ -0,0 +1,58 @@
+package main
+
+import (
+	"fmt"
+	"log"
+
+	"github.com/jinzhu/gorm"
+	_ "github.com/jinzhu/gorm/dialects/sqlite"
+)
+
+type Customer struct {
+	gorm.Model
+	FirstName string
+	LastName  string
+}
+
+func (u *Customer) BeforeUpdate() (err error) {
+	fmt.Println("before update")
+	return nil
+}
+
+func main() {
+	db, err := gorm.Open("sqlite3", "test.db")
+	if err != nil {
+		panic("failed to connect database")
+	}
+	defer db.Close()
+
+	// LogMode enable
+	db.LogMode(true)
+
+	// Migrate the schema
+	err = db.AutoMigrate(&Customer{}).Error
+	if err != nil {
+		log.Fatalf("error migrating ", err)
+	}
+
+	// Create
+	customer := Customer{FirstName: "Hans", LastName: "wurst"}
+	db.Create(&customer)
+
+	var foundCustomer Customer
+	// Plain SQL
+	db.First(&foundCustomer, "First_Name = ?", "Hans")
+	// Template
+	db.Where(&Customer{FirstName: "Hans"}).First(&foundCustomer)
+
+	fmt.Println("Gefunden wurde:", foundCustomer.FirstName)
+
+	// Update - update product's price to 2000
+	db.Model(&foundCustomer).Update("LastName", "Meiser")
+
+	err = db.Delete(&foundCustomer).Error
+	if err != nil {
+		panic(err)
+	}
+
+}
diff --git a/microservices/gorm-hooks/test.db b/microservices/gorm-hooks/test.db
new file mode 100644
index 0000000..1120d73
Binary files /dev/null and b/microservices/gorm-hooks/test.db differ
diff --git a/microservices/gorm-relation/go.mod b/microservices/gorm-relation/go.mod
new file mode 100644
index 0000000..c1d87c3
--- /dev/null
+++ b/microservices/gorm-relation/go.mod
@@ -0,0 +1,5 @@
+module golang.source-fellows.com/samples/gormrelation
+
+go 1.14
+
+require github.com/jinzhu/gorm v1.9.14
diff --git a/microservices/gorm-relation/go.sum b/microservices/gorm-relation/go.sum
new file mode 100644
index 0000000..12a4fd1
--- /dev/null
+++ b/microservices/gorm-relation/go.sum
@@ -0,0 +1,32 @@
+github.com/PuerkitoBio/goquery v1.5.1/go.mod h1:GsLWisAFVj4WgDibEWF4pvYnkVQBpKBKeU+7zCJoLcc=
+github.com/andybalholm/cascadia v1.1.0/go.mod h1:GsXiBklL0woXo1j/WYWtSYYC4ouU9PqHO0sqidkEA4Y=
+github.com/denisenkom/go-mssqldb v0.0.0-20191124224453-732737034ffd h1:83Wprp6ROGeiHFAP8WJdI2RoxALQYgdllERc3N5N2DM=
+github.com/denisenkom/go-mssqldb v0.0.0-20191124224453-732737034ffd/go.mod h1:xbL0rPBG9cCiLr28tMa8zpbdarY27NDyej4t/EjAShU=
+github.com/erikstmartin/go-testdb v0.0.0-20160219214506-8d10e4a1bae5 h1:Yzb9+7DPaBjB8zlTR87/ElzFsnQfuHnVUVqpZZIcV5Y=
+github.com/erikstmartin/go-testdb v0.0.0-20160219214506-8d10e4a1bae5/go.mod h1:a2zkGnVExMxdzMo3M0Hi/3sEU+cWnZpSni0O6/Yb/P0=
+github.com/go-sql-driver/mysql v1.5.0 h1:ozyZYNQW3x3HtqT1jira07DN2PArx2v7/mN66gGcHOs=
+github.com/go-sql-driver/mysql v1.5.0/go.mod h1:DCzpHaOWr8IXmIStZouvnhqoel9Qv2LBy8hT2VhHyBg=
+github.com/golang-sql/civil v0.0.0-20190719163853-cb61b32ac6fe h1:lXe2qZdvpiX5WZkZR4hgp4KJVfY3nMkvmwbVkpv1rVY=
+github.com/golang-sql/civil v0.0.0-20190719163853-cb61b32ac6fe/go.mod h1:8vg3r2VgvsThLBIFL93Qb5yWzgyZWhEmBwUJWevAkK0=
+github.com/jinzhu/gorm v1.9.14 h1:Kg3ShyTPcM6nzVo148fRrcMO6MNKuqtOUwnzqMgVniM=
+github.com/jinzhu/gorm v1.9.14/go.mod h1:G3LB3wezTOWM2ITLzPxEXgSkOXAntiLHS7UdBefADcs=
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+github.com/jinzhu/now v1.0.1 h1:HjfetcXq097iXP0uoPCdnM4Efp5/9MsM0/M+XOTeR3M=
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+github.com/lib/pq v1.1.1 h1:sJZmqHoEaY7f+NPP8pgLB/WxulyR3fewgCM2qaSlBb4=
+github.com/lib/pq v1.1.1/go.mod h1:5WUZQaWbwv1U+lTReE5YruASi9Al49XbQIvNi/34Woo=
+github.com/mattn/go-sqlite3 v1.14.0 h1:mLyGNKR8+Vv9CAU7PphKa2hkEqxxhn8i32J6FPj1/QA=
+github.com/mattn/go-sqlite3 v1.14.0/go.mod h1:JIl7NbARA7phWnGvh0LKTyg7S9BA+6gx71ShQilpsus=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
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+golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
diff --git a/microservices/gorm-relation/main.go b/microservices/gorm-relation/main.go
new file mode 100644
index 0000000..8faac45
--- /dev/null
+++ b/microservices/gorm-relation/main.go
@@ -0,0 +1,51 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/jinzhu/gorm"
+	_ "github.com/jinzhu/gorm/dialects/sqlite"
+)
+
+type Customer struct {
+	gorm.Model
+	FirstName    string
+	LastName     string
+	CreditCard   CreditCard
+	CreditCardId uint
+}
+
+type CreditCard struct {
+	gorm.Model
+	Number string
+}
+
+func main() {
+	db, err := gorm.Open("sqlite3", "test.db")
+	if err != nil {
+		panic("failed to connect database")
+	}
+	defer db.Close()
+
+	// LogMode enable
+	db.LogMode(true)
+
+	// Migrate the schema
+	db.AutoMigrate(&CreditCard{}, &Customer{})
+
+	// Create
+	customer := Customer{FirstName: "Hans", LastName: "wurst"}
+	customer.CreditCard = CreditCard{Number: "123-123-123"}
+	db.Set("gorm:association_autoupdate", false).Set("gorm:association_autoupdate", true).Create(&customer)
+
+	var foundCustomer Customer
+	var foundCreditCard CreditCard
+
+	db.Where(&Customer{FirstName: "Hans"}).First(&foundCustomer)
+	db.Model(&foundCustomer).Related(&foundCreditCard)
+
+	fmt.Println("Gefunden wurde:", foundCreditCard.Number)
+
+	db.Delete(&foundCustomer)
+
+}
diff --git a/microservices/gorm/go.mod b/microservices/gorm/go.mod
new file mode 100644
index 0000000..0f19ba4
--- /dev/null
+++ b/microservices/gorm/go.mod
@@ -0,0 +1,8 @@
+module golang.source-fellows.com/samples/gorm
+
+go 1.14
+
+require (
+	github.com/Unknwon/log v0.0.0-20200308114134-929b1006e34a
+	github.com/jinzhu/gorm v1.9.14
+)
diff --git a/microservices/gorm/go.sum b/microservices/gorm/go.sum
new file mode 100644
index 0000000..f7bce9b
--- /dev/null
+++ b/microservices/gorm/go.sum
@@ -0,0 +1,27 @@
+github.com/PuerkitoBio/goquery v1.5.1/go.mod h1:GsLWisAFVj4WgDibEWF4pvYnkVQBpKBKeU+7zCJoLcc=
+github.com/Unknwon/log v0.0.0-20200308114134-929b1006e34a h1:2/IoPLpPzmKDdgAfM0aQVp71xVK5G/FKUqPWHQw5xp8=
+github.com/Unknwon/log v0.0.0-20200308114134-929b1006e34a/go.mod h1:/+ZenhmdkCX8gc8YHVQRSdVGE/+F9HvTY6QDTwEbaO4=
+github.com/andybalholm/cascadia v1.1.0/go.mod h1:GsXiBklL0woXo1j/WYWtSYYC4ouU9PqHO0sqidkEA4Y=
+github.com/denisenkom/go-mssqldb v0.0.0-20191124224453-732737034ffd/go.mod h1:xbL0rPBG9cCiLr28tMa8zpbdarY27NDyej4t/EjAShU=
+github.com/erikstmartin/go-testdb v0.0.0-20160219214506-8d10e4a1bae5/go.mod h1:a2zkGnVExMxdzMo3M0Hi/3sEU+cWnZpSni0O6/Yb/P0=
+github.com/go-sql-driver/mysql v1.5.0/go.mod h1:DCzpHaOWr8IXmIStZouvnhqoel9Qv2LBy8hT2VhHyBg=
+github.com/golang-sql/civil v0.0.0-20190719163853-cb61b32ac6fe/go.mod h1:8vg3r2VgvsThLBIFL93Qb5yWzgyZWhEmBwUJWevAkK0=
+github.com/jinzhu/gorm v1.9.14 h1:Kg3ShyTPcM6nzVo148fRrcMO6MNKuqtOUwnzqMgVniM=
+github.com/jinzhu/gorm v1.9.14/go.mod h1:G3LB3wezTOWM2ITLzPxEXgSkOXAntiLHS7UdBefADcs=
+github.com/jinzhu/inflection v1.0.0 h1:K317FqzuhWc8YvSVlFMCCUb36O/S9MCKRDI7QkRKD/E=
+github.com/jinzhu/inflection v1.0.0/go.mod h1:h+uFLlag+Qp1Va5pdKtLDYj+kHp5pxUVkryuEj+Srlc=
+github.com/jinzhu/now v1.0.1/go.mod h1:d3SSVoowX0Lcu0IBviAWJpolVfI5UJVZZ7cO71lE/z8=
+github.com/lib/pq v1.1.1/go.mod h1:5WUZQaWbwv1U+lTReE5YruASi9Al49XbQIvNi/34Woo=
+github.com/mattn/go-sqlite3 v1.14.0 h1:mLyGNKR8+Vv9CAU7PphKa2hkEqxxhn8i32J6FPj1/QA=
+github.com/mattn/go-sqlite3 v1.14.0/go.mod h1:JIl7NbARA7phWnGvh0LKTyg7S9BA+6gx71ShQilpsus=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20190325154230-a5d413f7728c/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20191205180655-e7c4368fe9dd/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
+golang.org/x/net v0.0.0-20180218175443-cbe0f9307d01/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/net v0.0.0-20200202094626-16171245cfb2/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20200324143707-d3edc9973b7e/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
diff --git a/microservices/gorm/main.go b/microservices/gorm/main.go
new file mode 100644
index 0000000..75be97c
--- /dev/null
+++ b/microservices/gorm/main.go
@@ -0,0 +1,53 @@
+package main
+
+import (
+	"fmt"
+	"log"
+
+	"github.com/jinzhu/gorm"
+	_ "github.com/jinzhu/gorm/dialects/sqlite"
+)
+
+type Customer struct {
+	gorm.Model
+	FirstName string
+	LastName  string
+}
+
+func main() {
+	db, err := gorm.Open("sqlite3", "test.db")
+	if err != nil {
+		panic("failed to connect database")
+	}
+	defer db.Close()
+
+	// LogMode enable
+	db.LogMode(true)
+
+	// Migrate the schema
+	err = db.AutoMigrate(&Customer{}).Error
+	if err != nil {
+		log.Fatalf("error migrating ", err)
+	}
+
+	// Create
+	customer := Customer{FirstName: "Hans", LastName: "wurst"}
+	db.Create(&customer)
+
+	var foundCustomer Customer
+	// Plain SQL
+	db.First(&foundCustomer, "First_Name = ?", "Hans")
+	// Template
+	db.Where(&Customer{FirstName: "Hans"}).First(&foundCustomer)
+
+	fmt.Println("Gefunden wurde:", foundCustomer.FirstName)
+
+	// Update - update product's price to 2000
+	db.Model(&foundCustomer).Update("LastName", "Meiser")
+
+	err = db.Delete(&foundCustomer).Error
+	if err != nil {
+		panic(err)
+	}
+
+}
diff --git a/microservices/grpc/client/cmd/main.go b/microservices/grpc/client/cmd/main.go
new file mode 100644
index 0000000..0962aa7
--- /dev/null
+++ b/microservices/grpc/client/cmd/main.go
@@ -0,0 +1,22 @@
+package main
+
+import (
+	"context"
+	"log"
+
+	"golang.source-fellows.com/samples/grpc/hello"
+	"google.golang.org/grpc"
+	"google.golang.org/protobuf/types/known/emptypb"
+)
+
+func main() {
+	con, _ := grpc.Dial(":8080", grpc.WithInsecure())
+	client := hello.NewHelloWorldServiceClient(con)
+
+	ctx := context.Background()
+	answer, err := client.SayHello(ctx, &emptypb.Empty{})
+	if err != nil {
+		log.Fatal(err)
+	}
+	log.Println(answer.GetMessageText())
+}
diff --git a/microservices/grpc/client/go.mod b/microservices/grpc/client/go.mod
new file mode 100644
index 0000000..0f8ec44
--- /dev/null
+++ b/microservices/grpc/client/go.mod
@@ -0,0 +1,11 @@
+module golang.source-fellows.com/samples/grpc/client
+
+go 1.13
+
+require (
+	golang.source-fellows.com/samples/grpc/hello v0.0.0
+	google.golang.org/grpc v1.30.0
+	google.golang.org/protobuf v1.25.0
+)
+
+replace golang.source-fellows.com/samples/grpc/hello => ./../hello
diff --git a/microservices/grpc/client/go.sum b/microservices/grpc/client/go.sum
new file mode 100644
index 0000000..6807b9f
--- /dev/null
+++ b/microservices/grpc/client/go.sum
@@ -0,0 +1,78 @@
+cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
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diff --git a/microservices/grpc/hello/go.mod b/microservices/grpc/hello/go.mod
new file mode 100644
index 0000000..916e5fe
--- /dev/null
+++ b/microservices/grpc/hello/go.mod
@@ -0,0 +1,9 @@
+module golang.source-fellows.com/samples/grpc/hello
+
+go 1.13
+
+require (
+	github.com/golang/protobuf v1.4.2
+	google.golang.org/grpc v1.30.0
+	google.golang.org/protobuf v1.25.0
+)
diff --git a/microservices/grpc/hello/go.sum b/microservices/grpc/hello/go.sum
new file mode 100644
index 0000000..c0931d5
--- /dev/null
+++ b/microservices/grpc/hello/go.sum
@@ -0,0 +1,75 @@
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diff --git a/microservices/grpc/hello/hello-message.pb.go b/microservices/grpc/hello/hello-message.pb.go
new file mode 100644
index 0000000..0078d92
--- /dev/null
+++ b/microservices/grpc/hello/hello-message.pb.go
@@ -0,0 +1,161 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.25.0-devel
+// 	protoc        v3.12.3
+// source: hello-message.proto
+
+package hello
+
+import (
+	proto "github.com/golang/protobuf/proto"
+	empty "github.com/golang/protobuf/ptypes/empty"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+// This is a compile-time assertion that a sufficiently up-to-date version
+// of the legacy proto package is being used.
+const _ = proto.ProtoPackageIsVersion4
+
+type HelloMessage struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	MessageText string `protobuf:"bytes,1,opt,name=messageText,proto3" json:"messageText,omitempty"`
+}
+
+func (x *HelloMessage) Reset() {
+	*x = HelloMessage{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_hello_message_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *HelloMessage) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*HelloMessage) ProtoMessage() {}
+
+func (x *HelloMessage) ProtoReflect() protoreflect.Message {
+	mi := &file_hello_message_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use HelloMessage.ProtoReflect.Descriptor instead.
+func (*HelloMessage) Descriptor() ([]byte, []int) {
+	return file_hello_message_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *HelloMessage) GetMessageText() string {
+	if x != nil {
+		return x.MessageText
+	}
+	return ""
+}
+
+var File_hello_message_proto protoreflect.FileDescriptor
+
+var file_hello_message_proto_rawDesc = []byte{
+	0x0a, 0x13, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x2d, 0x6d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x2e,
+	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x05, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x1a, 0x1b, 0x67, 0x6f,
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+	0x70, 0x74, 0x79, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x22, 0x30, 0x0a, 0x0c, 0x48, 0x65, 0x6c,
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+	0x72, 0x70, 0x63, 0x2f, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f,
+	0x33,
+}
+
+var (
+	file_hello_message_proto_rawDescOnce sync.Once
+	file_hello_message_proto_rawDescData = file_hello_message_proto_rawDesc
+)
+
+func file_hello_message_proto_rawDescGZIP() []byte {
+	file_hello_message_proto_rawDescOnce.Do(func() {
+		file_hello_message_proto_rawDescData = protoimpl.X.CompressGZIP(file_hello_message_proto_rawDescData)
+	})
+	return file_hello_message_proto_rawDescData
+}
+
+var file_hello_message_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
+var file_hello_message_proto_goTypes = []interface{}{
+	(*HelloMessage)(nil), // 0: hello.HelloMessage
+	(*empty.Empty)(nil),  // 1: google.protobuf.Empty
+}
+var file_hello_message_proto_depIdxs = []int32{
+	1, // 0: hello.HelloWorldService.sayHello:input_type -> google.protobuf.Empty
+	0, // 1: hello.HelloWorldService.sayHello:output_type -> hello.HelloMessage
+	1, // [1:2] is the sub-list for method output_type
+	0, // [0:1] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_hello_message_proto_init() }
+func file_hello_message_proto_init() {
+	if File_hello_message_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_hello_message_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*HelloMessage); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_hello_message_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   1,
+			NumExtensions: 0,
+			NumServices:   1,
+		},
+		GoTypes:           file_hello_message_proto_goTypes,
+		DependencyIndexes: file_hello_message_proto_depIdxs,
+		MessageInfos:      file_hello_message_proto_msgTypes,
+	}.Build()
+	File_hello_message_proto = out.File
+	file_hello_message_proto_rawDesc = nil
+	file_hello_message_proto_goTypes = nil
+	file_hello_message_proto_depIdxs = nil
+}
diff --git a/microservices/grpc/hello/hello-message.proto b/microservices/grpc/hello/hello-message.proto
new file mode 100644
index 0000000..31ab508
--- /dev/null
+++ b/microservices/grpc/hello/hello-message.proto
@@ -0,0 +1,15 @@
+syntax="proto3";
+
+package hello;
+
+option go_package = "golang.source-fellows.com/samples/grpc/hello";
+
+import "google/protobuf/empty.proto";
+
+message HelloMessage {
+    string messageText = 1;
+}
+
+service HelloWorldService {
+    rpc sayHello(google.protobuf.Empty) returns (HelloMessage);
+}
\ No newline at end of file
diff --git a/microservices/grpc/hello/hello-message_grpc.pb.go b/microservices/grpc/hello/hello-message_grpc.pb.go
new file mode 100644
index 0000000..fb2d784
--- /dev/null
+++ b/microservices/grpc/hello/hello-message_grpc.pb.go
@@ -0,0 +1,91 @@
+// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
+
+package hello
+
+import (
+	context "context"
+	empty "github.com/golang/protobuf/ptypes/empty"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
+)
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion6
+
+// HelloWorldServiceClient is the client API for HelloWorldService service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
+type HelloWorldServiceClient interface {
+	SayHello(ctx context.Context, in *empty.Empty, opts ...grpc.CallOption) (*HelloMessage, error)
+}
+
+type helloWorldServiceClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewHelloWorldServiceClient(cc grpc.ClientConnInterface) HelloWorldServiceClient {
+	return &helloWorldServiceClient{cc}
+}
+
+func (c *helloWorldServiceClient) SayHello(ctx context.Context, in *empty.Empty, opts ...grpc.CallOption) (*HelloMessage, error) {
+	out := new(HelloMessage)
+	err := c.cc.Invoke(ctx, "/hello.HelloWorldService/sayHello", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// HelloWorldServiceServer is the server API for HelloWorldService service.
+// All implementations must embed UnimplementedHelloWorldServiceServer
+// for forward compatibility
+type HelloWorldServiceServer interface {
+	SayHello(context.Context, *empty.Empty) (*HelloMessage, error)
+	mustEmbedUnimplementedHelloWorldServiceServer()
+}
+
+// UnimplementedHelloWorldServiceServer must be embedded to have forward compatible implementations.
+type UnimplementedHelloWorldServiceServer struct {
+}
+
+func (*UnimplementedHelloWorldServiceServer) SayHello(context.Context, *empty.Empty) (*HelloMessage, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method SayHello not implemented")
+}
+func (*UnimplementedHelloWorldServiceServer) mustEmbedUnimplementedHelloWorldServiceServer() {}
+
+func RegisterHelloWorldServiceServer(s *grpc.Server, srv HelloWorldServiceServer) {
+	s.RegisterService(&_HelloWorldService_serviceDesc, srv)
+}
+
+func _HelloWorldService_SayHello_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(empty.Empty)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(HelloWorldServiceServer).SayHello(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/hello.HelloWorldService/SayHello",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(HelloWorldServiceServer).SayHello(ctx, req.(*empty.Empty))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+var _HelloWorldService_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "hello.HelloWorldService",
+	HandlerType: (*HelloWorldServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "sayHello",
+			Handler:    _HelloWorldService_SayHello_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "hello-message.proto",
+}
diff --git a/microservices/grpc/server/cmd/main.go b/microservices/grpc/server/cmd/main.go
new file mode 100644
index 0000000..4796d91
--- /dev/null
+++ b/microservices/grpc/server/cmd/main.go
@@ -0,0 +1,18 @@
+package main
+
+import (
+	"log"
+	"net"
+
+	"golang.source-fellows.com/samples/grpc/hello"
+	"golang.source-fellows.com/samples/grpc/server"
+	"google.golang.org/grpc"
+)
+
+func main() {
+	srv := grpc.NewServer()
+	hello.RegisterHelloWorldServiceServer(srv, &server.HelloService{})
+	listener, _ := net.Listen("tcp", ":8080")
+	log.Println("Starting Server ...")
+	log.Fatal(srv.Serve(listener))
+}
diff --git a/microservices/grpc/server/go.mod b/microservices/grpc/server/go.mod
new file mode 100644
index 0000000..6d92815
--- /dev/null
+++ b/microservices/grpc/server/go.mod
@@ -0,0 +1,13 @@
+module golang.source-fellows.com/samples/grpc/server
+
+go 1.13
+
+require (
+	github.com/golang/protobuf v1.4.2
+	golang.source-fellows.com/samples/grpc/hello v0.0.0
+	google.golang.org/grpc v1.30.0
+	google.golang.org/grpc/cmd/protoc-gen-go-grpc v0.0.0-20200630190442-3de8449f8555 // indirect
+	google.golang.org/protobuf v1.25.0
+)
+
+replace golang.source-fellows.com/samples/grpc/hello => ./../hello
diff --git a/microservices/grpc/server/go.sum b/microservices/grpc/server/go.sum
new file mode 100644
index 0000000..73c105d
--- /dev/null
+++ b/microservices/grpc/server/go.sum
@@ -0,0 +1,80 @@
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+google.golang.org/grpc v1.30.0 h1:M5a8xTlYTxwMn5ZFkwhRabsygDY5G8TYLyQDBxJNAxE=
+google.golang.org/grpc v1.30.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
+google.golang.org/grpc/cmd/protoc-gen-go-grpc v0.0.0-20200630190442-3de8449f8555 h1:HYZFXlXJqim8gcoUICZN9oGXFPtw2GEBFm3ay9KZnxU=
+google.golang.org/grpc/cmd/protoc-gen-go-grpc v0.0.0-20200630190442-3de8449f8555/go.mod h1:6Kw0yEErY5E/yWrBtf03jp27GLLJujG4z/JK95pnjjw=
+google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
+google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
+google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
+google.golang.org/protobuf v1.20.1-0.20200309200217-e05f789c0967/go.mod h1:A+miEFZTKqfCUM6K7xSMQL9OKL/b6hQv+e19PK+JZNE=
+google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzikPIcrTAo=
+google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
+google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
+google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
+google.golang.org/protobuf v1.25.0 h1:Ejskq+SyPohKW+1uil0JJMtmHCgJPJ/qWTxr8qp+R4c=
+google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
+honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
diff --git a/microservices/grpc/server/helloService.go b/microservices/grpc/server/helloService.go
new file mode 100644
index 0000000..f308d12
--- /dev/null
+++ b/microservices/grpc/server/helloService.go
@@ -0,0 +1,17 @@
+package server
+
+import (
+	context "context"
+
+	empty "github.com/golang/protobuf/ptypes/empty"
+	"golang.source-fellows.com/samples/grpc/hello"
+)
+
+type HelloService struct {
+	hello.UnimplementedHelloWorldServiceServer
+}
+
+func (hs *HelloService) SayHello(context.Context, *empty.Empty) (*hello.HelloMessage, error) {
+	msg := &hello.HelloMessage{MessageText: "Hello World"}
+	return msg, nil
+}
diff --git a/microservices/hanlder-impl/cmd/main.go b/microservices/hanlder-impl/cmd/main.go
new file mode 100644
index 0000000..60be16b
--- /dev/null
+++ b/microservices/hanlder-impl/cmd/main.go
@@ -0,0 +1,11 @@
+package main
+
+import (
+	"net/http"
+
+	"golang.source-fellows.com/samples/httphandler"
+)
+
+func main() {
+	http.ListenAndServe(":8080", &httphandler.MyHandler{})
+}
diff --git a/microservices/hanlder-impl/go.mod b/microservices/hanlder-impl/go.mod
new file mode 100644
index 0000000..df86df0
--- /dev/null
+++ b/microservices/hanlder-impl/go.mod
@@ -0,0 +1,3 @@
+module golang.source-fellows.com/samples/httphandler
+
+go 1.13
diff --git a/microservices/hanlder-impl/go.sum b/microservices/hanlder-impl/go.sum
new file mode 100644
index 0000000..16e9303
--- /dev/null
+++ b/microservices/hanlder-impl/go.sum
@@ -0,0 +1 @@
+golang.source-fellows.com v0.0.0-20200619133407-79aa8981720c h1:c0BKYhs4PULAm3Hb5f+t9AcmPRScdSAkeuajndyOMLQ=
diff --git a/microservices/hanlder-impl/handler.go b/microservices/hanlder-impl/handler.go
new file mode 100644
index 0000000..81067fe
--- /dev/null
+++ b/microservices/hanlder-impl/handler.go
@@ -0,0 +1,9 @@
+package httphandler
+
+import "net/http"
+
+type MyHandler struct{}
+
+func (mh *MyHandler) ServeHTTP(writer http.ResponseWriter, req *http.Request) {
+	writer.Write([]byte("Hello World!"))
+}
diff --git a/microservices/http-client-circut-breaker/go.mod b/microservices/http-client-circut-breaker/go.mod
new file mode 100644
index 0000000..1e10229
--- /dev/null
+++ b/microservices/http-client-circut-breaker/go.mod
@@ -0,0 +1,5 @@
+module golang.source-fellows.com/samples/httpcircuitbreaker
+
+go 1.13
+
+require github.com/sony/gobreaker v0.4.1
diff --git a/microservices/http-client-circut-breaker/go.sum b/microservices/http-client-circut-breaker/go.sum
new file mode 100644
index 0000000..11b0e52
--- /dev/null
+++ b/microservices/http-client-circut-breaker/go.sum
@@ -0,0 +1,6 @@
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/sony/gobreaker v0.4.1 h1:oMnRNZXX5j85zso6xCPRNPtmAycat+WcoKbklScLDgQ=
+github.com/sony/gobreaker v0.4.1/go.mod h1:ZKptC7FHNvhBz7dN2LGjPVBz2sZJmc0/PkyDJOjmxWY=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
diff --git a/microservices/http-client-circut-breaker/main.go b/microservices/http-client-circut-breaker/main.go
new file mode 100644
index 0000000..1064cc2
--- /dev/null
+++ b/microservices/http-client-circut-breaker/main.go
@@ -0,0 +1,43 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"time"
+
+	breaker "github.com/sony/gobreaker"
+)
+
+var cb *breaker.CircuitBreaker
+
+func main() {
+
+	settings := breaker.Settings{Interval: 1 * time.Second, Timeout: 5 * time.Second}
+	cb = breaker.NewCircuitBreaker(settings)
+
+	for {
+		bites, err := cb.Execute(func() (interface{}, error) {
+			res, err := http.Get("http://localhost:8080/a")
+			if err != nil {
+				return nil, err
+			}
+			if res.StatusCode == http.StatusOK {
+
+			}
+			defer res.Body.Close()
+			bites, _ := ioutil.ReadAll(res.Body)
+			return bites, nil
+		})
+
+		if err != nil {
+			log.Printf("error %v\n", err)
+
+		} else {
+			fmt.Println(string(bites.([]byte)))
+		}
+
+	}
+
+}
diff --git a/microservices/http-client-config/main.go b/microservices/http-client-config/main.go
new file mode 100644
index 0000000..c823ae5
--- /dev/null
+++ b/microservices/http-client-config/main.go
@@ -0,0 +1,17 @@
+package main
+
+import (
+	"net/http"
+	"time"
+)
+
+func main() {
+	client := http.Client{Transport: &http.Transport{
+		ResponseHeaderTimeout: 1 * time.Millisecond,
+	}}
+	res, err := client.Get("https://google.com")
+	if err != nil {
+		panic(err)
+	}
+	defer res.Body.Close()
+}
diff --git a/microservices/http-client-ssl-cert/certs/ca/certsdb/01.pem b/microservices/http-client-ssl-cert/certs/ca/certsdb/01.pem
new file mode 100644
index 0000000..1844631
--- /dev/null
+++ b/microservices/http-client-ssl-cert/certs/ca/certsdb/01.pem
@@ -0,0 +1,71 @@
+Certificate:
+    Data:
+        Version: 1 (0x0)
+        Serial Number: 1 (0x1)
+        Signature Algorithm: sha1WithRSAEncryption
+        Issuer: C=DE, ST=BW, L=Reutlingen, O=Source Fellows GmbH/emailAddress=webmaster@example.private, CN=test.example.private
+        Validity
+            Not Before: Jul  9 04:15:47 2020 GMT
+            Not After : Jul  9 04:15:47 2021 GMT
+        Subject: C=DE, ST=BW, L=Reutlingen, O=Source Fellows GmbH, CN=test.example.private/emailAddress=user@example.private
+        Subject Public Key Info:
+            Public Key Algorithm: rsaEncryption
+                RSA Public-Key: (2048 bit)
+                Modulus:
+                    00:e3:a9:b6:c5:35:06:6d:12:ee:e7:ee:60:89:49:
+                    2a:ac:b2:be:3d:f7:c5:4d:55:08:fc:80:43:aa:fd:
+                    05:6c:43:94:a5:02:c9:1f:fc:70:c4:44:85:5a:b8:
+                    f9:95:f8:8a:5c:2e:12:55:43:23:f2:d0:34:c3:a4:
+                    41:89:14:a9:d1:19:d4:0d:d0:58:87:38:9f:6c:1d:
+                    89:2d:23:60:8f:9e:af:f4:5a:f0:d0:a4:fd:4a:49:
+                    9b:19:df:97:20:db:80:7b:ee:f2:ba:e7:9a:b4:3c:
+                    48:74:9c:57:61:0b:4e:ee:eb:53:5d:ca:3d:9e:f3:
+                    d2:d5:1a:f7:7a:34:1d:09:73:44:1c:af:3d:31:72:
+                    90:e9:43:0b:b3:c9:30:58:21:df:27:5b:39:42:85:
+                    f1:ec:d9:1c:89:38:64:92:d6:da:f9:22:c1:e9:b5:
+                    22:bf:3a:32:10:f9:e3:e6:b3:73:1d:d2:7e:a9:a6:
+                    27:86:83:8c:7e:9d:4f:39:d0:53:45:0b:f7:89:8b:
+                    f2:8c:43:44:42:a9:4a:81:83:60:bb:1f:63:f5:75:
+                    fa:73:3b:85:c9:62:7d:1d:8a:61:4c:3c:f9:23:a3:
+                    3d:97:78:6f:6d:13:db:88:79:fb:89:0b:3e:a6:50:
+                    b8:72:9a:c8:d3:7b:d2:ec:6c:15:3d:ab:f7:8b:c8:
+                    50:9b
+                Exponent: 65537 (0x10001)
+    Signature Algorithm: sha1WithRSAEncryption
+         95:b9:66:f0:95:05:82:2c:9b:f6:85:ea:68:7c:ae:18:b5:d1:
+         12:10:22:2f:2f:1f:5f:d8:15:b6:b3:87:4a:dc:b1:1c:1d:c3:
+         8c:80:2f:cb:d2:bd:36:35:53:27:20:c0:b8:5f:58:92:8e:60:
+         2a:01:f1:08:38:d0:97:6f:4f:a1:57:17:e7:b9:fc:e1:67:7a:
+         97:1b:b3:e1:36:26:06:b2:32:9d:5a:12:4b:2d:b7:0b:8b:c8:
+         09:bc:5c:b1:8f:f8:42:24:97:10:6d:6a:eb:82:99:0a:bf:e8:
+         fe:9c:1d:52:f2:2d:78:18:a4:9f:33:27:88:54:86:09:11:0e:
+         fd:d5:5c:0d:65:c4:78:bd:cc:2f:34:59:e0:13:e8:02:ed:98:
+         c4:9e:7f:5e:f7:9b:18:d1:c6:76:eb:1b:dc:76:6a:a6:ab:f3:
+         b5:8f:b5:0a:ad:cf:07:d5:cf:6c:69:ae:0c:f5:dc:f2:b2:11:
+         2b:b2:b6:a5:b5:63:6b:1f:0d:7b:cd:07:81:59:40:5e:12:c9:
+         41:73:cf:08:87:3c:ab:38:51:27:c2:ad:c6:57:20:dc:bd:fe:
+         cf:ea:b5:37:29:be:c1:f4:9b:61:ad:a3:f8:5c:d7:7b:65:2e:
+         80:f9:6b:dd:42:a8:62:ae:52:0d:95:f7:67:04:10:b9:97:24:
+         48:33:fb:22
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/microservices/http-client-ssl-cert/certs/ca/index.txt b/microservices/http-client-ssl-cert/certs/ca/index.txt
new file mode 100644
index 0000000..27662dd
--- /dev/null
+++ b/microservices/http-client-ssl-cert/certs/ca/index.txt
@@ -0,0 +1 @@
+V	210709041547Z		01	unknown	/C=DE/ST=BW/L=Reutlingen/O=Source Fellows GmbH/CN=test.example.private/emailAddress=user@example.private
diff --git a/microservices/http-client-ssl-cert/certs/ca/index.txt.attr b/microservices/http-client-ssl-cert/certs/ca/index.txt.attr
new file mode 100644
index 0000000..8f7e63a
--- /dev/null
+++ b/microservices/http-client-ssl-cert/certs/ca/index.txt.attr
@@ -0,0 +1 @@
+unique_subject = yes
diff --git a/microservices/http-client-ssl-cert/certs/ca/index.txt.attr.old b/microservices/http-client-ssl-cert/certs/ca/index.txt.attr.old
new file mode 100644
index 0000000..e69de29
diff --git a/microservices/http-client-ssl-cert/certs/ca/index.txt.old b/microservices/http-client-ssl-cert/certs/ca/index.txt.old
new file mode 100644
index 0000000..e69de29
diff --git a/microservices/http-client-ssl-cert/certs/ca/serial b/microservices/http-client-ssl-cert/certs/ca/serial
new file mode 100644
index 0000000..9e22bcb
--- /dev/null
+++ b/microservices/http-client-ssl-cert/certs/ca/serial
@@ -0,0 +1 @@
+02
diff --git a/microservices/http-client-ssl-cert/certs/ca/serial.old b/microservices/http-client-ssl-cert/certs/ca/serial.old
new file mode 100644
index 0000000..8a0f05e
--- /dev/null
+++ b/microservices/http-client-ssl-cert/certs/ca/serial.old
@@ -0,0 +1 @@
+01
diff --git a/microservices/http-client-ssl-cert/certs/myRoot.crt b/microservices/http-client-ssl-cert/certs/myRoot.crt
new file mode 100644
index 0000000..242eadf
--- /dev/null
+++ b/microservices/http-client-ssl-cert/certs/myRoot.crt
@@ -0,0 +1,21 @@
+-----BEGIN CERTIFICATE-----
+MIIDhTCCAm2gAwIBAgIUS7TqIYrkdb2kEmtuawe8h/54VVIwDQYJKoZIhvcNAQEL
+BQAwUjELMAkGA1UEBhMCREUxEDAOBgNVBAgMB0JhV8ODwrwxEzARBgNVBAcMClJl
+dXRsaW5nZW4xHDAaBgNVBAoME1NvdXJjZSBGZWxsb3dzIEdtYkgwHhcNMjAwNzA4
+MDM1ODE4WhcNMzAwNzA2MDM1ODE4WjBSMQswCQYDVQQGEwJERTEQMA4GA1UECAwH
+QmFXw4PCvDETMBEGA1UEBwwKUmV1dGxpbmdlbjEcMBoGA1UECgwTU291cmNlIEZl
+bGxvd3MgR21iSDCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBANY+x2Kr
+U49506heEh2s0Q5vTjXUbP5814pHhlJ43X3p7QYMbJ/BBunxLA3a8GvuukgD1Wxr
+0T0uHo5/MLxRh6r1TEy80IApUsyCcAO3jdTGtIr4iebnAOL/Dw0TGWDRyl5SZCwo
+BsVSOfCoJyMs+ygB+BLE+05Dq5FwA3CpxP5r67efBpY2Y9bu1iXAC179rGaVvtLM
+3Zy5G+tQ0aMJYOqVR6tvSrrYg44gJiM270u6Os80V723fPtEUvKbHQOpZoleHWsb
+uZ1FbdQBcnJ2u3bI93ewQAvqQ3tjOqgell5n7kJ1B3Vjk8bVzda1zPKH9vcvF0fc
+gXdPrVOzBCa5Su8CAwEAAaNTMFEwHQYDVR0OBBYEFO3om6AZ9q/+r6kXo7hAhOBD
+SeTbMB8GA1UdIwQYMBaAFO3om6AZ9q/+r6kXo7hAhOBDSeTbMA8GA1UdEwEB/wQF
+MAMBAf8wDQYJKoZIhvcNAQELBQADggEBAMxKFUWYTQz/ACVY8lV18QCGxcvNj3Uz
+ZdtNUEDkxu6yKsl+1otREbuxqnfNjrGLmlLQfU/GlY+PCF85SYm1Ep4yKdZ7J+1c
+MG+PB5NS3cV7BnoJ6WnXk7KJRX+dYpCr+jQmQbtTshk6dM2a6THjyPzKkyDflcfM
+tXQROGDG9O/5DvF8Eqz13Gel5Wukept9mHtDHapU0BooFTXNqh+tPmFU76tKCQZV
+h0Qt9BC8A6bDEaULVlXpvNTuDCrCMGhiYEo2++PD/e5YT1UDVNSokanyFIUoCJAn
+X5u+VjRfaVibiWu8E63qoKv+oXBf9pwlNeE8KBlydzf5OQgx8FEkbfc=
+-----END CERTIFICATE-----
diff --git a/microservices/http-client-ssl-cert/certs/myRoot.key b/microservices/http-client-ssl-cert/certs/myRoot.key
new file mode 100644
index 0000000..a018d60
--- /dev/null
+++ b/microservices/http-client-ssl-cert/certs/myRoot.key
@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----
+MIIEowIBAAKCAQEA1j7HYqtTj3nTqF4SHazRDm9ONdRs/nzXikeGUnjdfentBgxs
+n8EG6fEsDdrwa+66SAPVbGvRPS4ejn8wvFGHqvVMTLzQgClSzIJwA7eN1Ma0iviJ
+5ucA4v8PDRMZYNHKXlJkLCgGxVI58KgnIyz7KAH4EsT7TkOrkXADcKnE/mvrt58G
+ljZj1u7WJcALXv2sZpW+0szdnLkb61DRowlg6pVHq29KutiDjiAmIzbvS7o6zzRX
+vbd8+0RS8psdA6lmiV4daxu5nUVt1AFycna7dsj3d7BAC+pDe2M6qB6WXmfuQnUH
+dWOTxtXN1rXM8of29y8XR9yBd0+tU7MEJrlK7wIDAQABAoIBAQC0GzaWthybAvly
+ExL7q2pbzipbimbOUbkI4DQFZOIelebSLOOsMSNUy5ATXbi7o4cqPz7N1J2j5v99
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+wcEp3pm+ub20bZBdFoxP15X3IisUGiQcrg/q4ZGHxOvJuzI9q4b0
+-----END RSA PRIVATE KEY-----
diff --git a/microservices/http-client-ssl-cert/certs/myRoot.srl b/microservices/http-client-ssl-cert/certs/myRoot.srl
new file mode 100644
index 0000000..ad3cbeb
--- /dev/null
+++ b/microservices/http-client-ssl-cert/certs/myRoot.srl
@@ -0,0 +1 @@
+73771BE66A4800A9EBDEF9018EBEDCDB7701BCC8
diff --git a/microservices/http-client-ssl-cert/certs/server-cert.conf b/microservices/http-client-ssl-cert/certs/server-cert.conf
new file mode 100644
index 0000000..306506a
--- /dev/null
+++ b/microservices/http-client-ssl-cert/certs/server-cert.conf
@@ -0,0 +1,6 @@
+authorityKeyIdentifier=keyid,issuer
+basicConstraints=CA:FALSE
+keyUsage = digitalSignature, nonRepudiation, keyEncipherment, dataEncipherment, keyCertSign
+subjectAltName = @alt_names
+[alt_names]
+DNS.1 = test.example.private
\ No newline at end of file
diff --git a/microservices/http-client-ssl-cert/certs/server-cert.request.conf b/microservices/http-client-ssl-cert/certs/server-cert.request.conf
new file mode 100644
index 0000000..09d661e
--- /dev/null
+++ b/microservices/http-client-ssl-cert/certs/server-cert.request.conf
@@ -0,0 +1,12 @@
+[req]
+distinguished_name = dn
+default_bits = 2048
+prompt = no
+default_md = sha256
+[dn]
+C=DE
+ST=BW
+L=Reutlingen
+O=Source Fellows GmbH
+emailAddress=webmaster@example.private
+CN = test.example.private
\ No newline at end of file
diff --git a/microservices/http-client-ssl-cert/certs/server-chain.crt b/microservices/http-client-ssl-cert/certs/server-chain.crt
new file mode 100644
index 0000000..2fc88c8
--- /dev/null
+++ b/microservices/http-client-ssl-cert/certs/server-chain.crt
@@ -0,0 +1,42 @@
+-----BEGIN CERTIFICATE-----
+MIIDhTCCAm2gAwIBAgIUS7TqIYrkdb2kEmtuawe8h/54VVIwDQYJKoZIhvcNAQEL
+BQAwUjELMAkGA1UEBhMCREUxEDAOBgNVBAgMB0JhV8ODwrwxEzARBgNVBAcMClJl
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+X5u+VjRfaVibiWu8E63qoKv+oXBf9pwlNeE8KBlydzf5OQgx8FEkbfc=
+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----
+MIIDcDCCAlgCFHN3G+ZqSACp6975AY6+3Nt3AbzIMA0GCSqGSIb3DQEBCwUAMFIx
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+LrQLEceRlUveswrFdPYZYVQq2gc=
+-----END CERTIFICATE-----
diff --git a/microservices/http-client-ssl-cert/certs/test.example.crt b/microservices/http-client-ssl-cert/certs/test.example.crt
new file mode 100644
index 0000000..caaa4fa
--- /dev/null
+++ b/microservices/http-client-ssl-cert/certs/test.example.crt
@@ -0,0 +1,21 @@
+-----BEGIN CERTIFICATE-----
+MIIDcDCCAlgCFHN3G+ZqSACp6975AY6+3Nt3AbzIMA0GCSqGSIb3DQEBCwUAMFIx
+CzAJBgNVBAYTAkRFMRAwDgYDVQQIDAdCYVfDg8K8MRMwEQYDVQQHDApSZXV0bGlu
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+LrQLEceRlUveswrFdPYZYVQq2gc=
+-----END CERTIFICATE-----
diff --git a/microservices/http-client-ssl-cert/certs/test.example.csr b/microservices/http-client-ssl-cert/certs/test.example.csr
new file mode 100644
index 0000000..9d3b8ec
--- /dev/null
+++ b/microservices/http-client-ssl-cert/certs/test.example.csr
@@ -0,0 +1,18 @@
+-----BEGIN CERTIFICATE REQUEST-----
+MIIC3DCCAcQCAQAwgZYxCzAJBgNVBAYTAkRFMQswCQYDVQQIDAJCVzETMBEGA1UE
+BwwKUmV1dGxpbmdlbjEcMBoGA1UECgwTU291cmNlIEZlbGxvd3MgR21iSDEoMCYG
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+Bmogwc3Y5xduKsqkSxWNEw==
+-----END CERTIFICATE REQUEST-----
diff --git a/microservices/http-client-ssl-cert/certs/test.example.key b/microservices/http-client-ssl-cert/certs/test.example.key
new file mode 100644
index 0000000..bacb8f4
--- /dev/null
+++ b/microservices/http-client-ssl-cert/certs/test.example.key
@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----
+MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQDEff9ZynNlYbqj
+TSl77iLejkEwkZuByBwW90CSNcU4GvYnBkiJphUGCV0ifZzEbs+a+AFi9n4AUeA6
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+KTrAWWyykNup7GJd4un8dNc=
+-----END PRIVATE KEY-----
diff --git a/microservices/http-client-ssl-cert/certs/user-cert.conf b/microservices/http-client-ssl-cert/certs/user-cert.conf
new file mode 100644
index 0000000..2e3dc14
--- /dev/null
+++ b/microservices/http-client-ssl-cert/certs/user-cert.conf
@@ -0,0 +1,28 @@
+authorityKeyIdentifier=keyid,issuer
+basicConstraints=CA:FALSE
+keyUsage = digitalSignature, nonRepudiation, keyEncipherment, dataEncipherment
+default_days    = 365
+[ca]
+default_ca = CA_default
+[ CA_default ]
+dir = ca
+certs		= $dir/certsdb
+new_certs_dir	= $certs
+database	= $dir/index.txt
+certificate	= $dir/cacert.pem
+private_key	= $dir/private/cakey.pem
+serial		= $dir/serial
+crldir		= $dir/crl
+crlnumber	= $dir/crlnumber
+crl		= $crldir/crl.pem
+RANDFILE	= $dir/private/.rand
+default_md      = sha1
+policy          = policy_match
+[ policy_match ]
+countryName             = match
+stateOrProvinceName     = match
+localityName            = supplied
+organizationName        = match
+organizationalUnitName  = optional
+commonName              = supplied
+emailAddress            = optional
\ No newline at end of file
diff --git a/microservices/http-client-ssl-cert/certs/user-cert.request.conf b/microservices/http-client-ssl-cert/certs/user-cert.request.conf
new file mode 100644
index 0000000..75449bf
--- /dev/null
+++ b/microservices/http-client-ssl-cert/certs/user-cert.request.conf
@@ -0,0 +1,12 @@
+[req]
+distinguished_name = dn
+default_bits = 2048
+prompt = no
+default_md = sha256
+[dn]
+C=DE
+ST=BW
+L=Reutlingen
+O=Source Fellows GmbH
+emailAddress=user@example.private
+CN = test.example.private
\ No newline at end of file
diff --git a/microservices/http-client-ssl-cert/certs/user-client.p12 b/microservices/http-client-ssl-cert/certs/user-client.p12
new file mode 100644
index 0000000..9bfe53c
Binary files /dev/null and b/microservices/http-client-ssl-cert/certs/user-client.p12 differ
diff --git a/microservices/http-client-ssl-cert/certs/user.crt b/microservices/http-client-ssl-cert/certs/user.crt
new file mode 100644
index 0000000..1844631
--- /dev/null
+++ b/microservices/http-client-ssl-cert/certs/user.crt
@@ -0,0 +1,71 @@
+Certificate:
+    Data:
+        Version: 1 (0x0)
+        Serial Number: 1 (0x1)
+        Signature Algorithm: sha1WithRSAEncryption
+        Issuer: C=DE, ST=BW, L=Reutlingen, O=Source Fellows GmbH/emailAddress=webmaster@example.private, CN=test.example.private
+        Validity
+            Not Before: Jul  9 04:15:47 2020 GMT
+            Not After : Jul  9 04:15:47 2021 GMT
+        Subject: C=DE, ST=BW, L=Reutlingen, O=Source Fellows GmbH, CN=test.example.private/emailAddress=user@example.private
+        Subject Public Key Info:
+            Public Key Algorithm: rsaEncryption
+                RSA Public-Key: (2048 bit)
+                Modulus:
+                    00:e3:a9:b6:c5:35:06:6d:12:ee:e7:ee:60:89:49:
+                    2a:ac:b2:be:3d:f7:c5:4d:55:08:fc:80:43:aa:fd:
+                    05:6c:43:94:a5:02:c9:1f:fc:70:c4:44:85:5a:b8:
+                    f9:95:f8:8a:5c:2e:12:55:43:23:f2:d0:34:c3:a4:
+                    41:89:14:a9:d1:19:d4:0d:d0:58:87:38:9f:6c:1d:
+                    89:2d:23:60:8f:9e:af:f4:5a:f0:d0:a4:fd:4a:49:
+                    9b:19:df:97:20:db:80:7b:ee:f2:ba:e7:9a:b4:3c:
+                    48:74:9c:57:61:0b:4e:ee:eb:53:5d:ca:3d:9e:f3:
+                    d2:d5:1a:f7:7a:34:1d:09:73:44:1c:af:3d:31:72:
+                    90:e9:43:0b:b3:c9:30:58:21:df:27:5b:39:42:85:
+                    f1:ec:d9:1c:89:38:64:92:d6:da:f9:22:c1:e9:b5:
+                    22:bf:3a:32:10:f9:e3:e6:b3:73:1d:d2:7e:a9:a6:
+                    27:86:83:8c:7e:9d:4f:39:d0:53:45:0b:f7:89:8b:
+                    f2:8c:43:44:42:a9:4a:81:83:60:bb:1f:63:f5:75:
+                    fa:73:3b:85:c9:62:7d:1d:8a:61:4c:3c:f9:23:a3:
+                    3d:97:78:6f:6d:13:db:88:79:fb:89:0b:3e:a6:50:
+                    b8:72:9a:c8:d3:7b:d2:ec:6c:15:3d:ab:f7:8b:c8:
+                    50:9b
+                Exponent: 65537 (0x10001)
+    Signature Algorithm: sha1WithRSAEncryption
+         95:b9:66:f0:95:05:82:2c:9b:f6:85:ea:68:7c:ae:18:b5:d1:
+         12:10:22:2f:2f:1f:5f:d8:15:b6:b3:87:4a:dc:b1:1c:1d:c3:
+         8c:80:2f:cb:d2:bd:36:35:53:27:20:c0:b8:5f:58:92:8e:60:
+         2a:01:f1:08:38:d0:97:6f:4f:a1:57:17:e7:b9:fc:e1:67:7a:
+         97:1b:b3:e1:36:26:06:b2:32:9d:5a:12:4b:2d:b7:0b:8b:c8:
+         09:bc:5c:b1:8f:f8:42:24:97:10:6d:6a:eb:82:99:0a:bf:e8:
+         fe:9c:1d:52:f2:2d:78:18:a4:9f:33:27:88:54:86:09:11:0e:
+         fd:d5:5c:0d:65:c4:78:bd:cc:2f:34:59:e0:13:e8:02:ed:98:
+         c4:9e:7f:5e:f7:9b:18:d1:c6:76:eb:1b:dc:76:6a:a6:ab:f3:
+         b5:8f:b5:0a:ad:cf:07:d5:cf:6c:69:ae:0c:f5:dc:f2:b2:11:
+         2b:b2:b6:a5:b5:63:6b:1f:0d:7b:cd:07:81:59:40:5e:12:c9:
+         41:73:cf:08:87:3c:ab:38:51:27:c2:ad:c6:57:20:dc:bd:fe:
+         cf:ea:b5:37:29:be:c1:f4:9b:61:ad:a3:f8:5c:d7:7b:65:2e:
+         80:f9:6b:dd:42:a8:62:ae:52:0d:95:f7:67:04:10:b9:97:24:
+         48:33:fb:22
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/microservices/http-client-ssl-cert/certs/user.key b/microservices/http-client-ssl-cert/certs/user.key
new file mode 100644
index 0000000..24ecb98
--- /dev/null
+++ b/microservices/http-client-ssl-cert/certs/user.key
@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----
diff --git a/microservices/http-client-ssl-cert/certs/user.req b/microservices/http-client-ssl-cert/certs/user.req
new file mode 100644
index 0000000..cddf1aa
--- /dev/null
+++ b/microservices/http-client-ssl-cert/certs/user.req
@@ -0,0 +1,18 @@
+-----BEGIN CERTIFICATE REQUEST-----
+MIIC1zCCAb8CAQAwgZExCzAJBgNVBAYTAkRFMQswCQYDVQQIDAJCVzETMBEGA1UE
+BwwKUmV1dGxpbmdlbjEcMBoGA1UECgwTU291cmNlIEZlbGxvd3MgR21iSDEjMCEG
+CSqGSIb3DQEJARYUdXNlckBleGFtcGxlLnByaXZhdGUxHTAbBgNVBAMMFHRlc3Qu
+ZXhhbXBsZS5wcml2YXRlMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA
+46m2xTUGbRLu5+5giUkqrLK+PffFTVUI/IBDqv0FbEOUpQLJH/xwxESFWrj5lfiK
+XC4SVUMj8tA0w6RBiRSp0RnUDdBYhzifbB2JLSNgj56v9Frw0KT9SkmbGd+XINuA
+e+7yuueatDxIdJxXYQtO7utTXco9nvPS1Rr3ejQdCXNEHK89MXKQ6UMLs8kwWCHf
+J1s5QoXx7NkciThkktba+SLB6bUivzoyEPnj5rNzHdJ+qaYnhoOMfp1POdBTRQv3
+iYvyjENEQqlKgYNgux9j9XX6czuFyWJ9HYphTDz5I6M9l3hvbRPbiHn7iQs+plC4
+cprI03vS7GwVPav3i8hQmwIDAQABoAAwDQYJKoZIhvcNAQELBQADggEBAJ2ZHvrq
+QE8yoiOSb+itUtWLo86T+qbSwHLy9Ned0wtu1XiL7ltJATyRwMbv1RduGcfYWBcx
+ZcUAcqYhsuSTM3MPg0MQvAFrLRwonq+TN6zq0K7RvZ5FSCizzcyThJIRcCtUNd0y
+heqknhsvnkIwSQCb4RPF3/57FXct1FNEHEKMtldWEHCkKbJnUtt9Z/4WEkmTCvzi
+EYwcwoK6QsmJOIwQXzOYniaPf2k8oeBLu81sq5GG5vRZvs9dFX6HQmfQ28oKeMCy
+8n6XGHPudNybKBykvYzRKbChVl6LiFdz1f95x5JSh+aJx8Ca8mq5NpFK0TJEzQWv
+NUvFSnG7X4w6JJg=
+-----END CERTIFICATE REQUEST-----
diff --git a/microservices/http-client-ssl-cert/main.go b/microservices/http-client-ssl-cert/main.go
new file mode 100644
index 0000000..559bd68
--- /dev/null
+++ b/microservices/http-client-ssl-cert/main.go
@@ -0,0 +1,31 @@
+package main
+
+import (
+	"crypto/tls"
+	"crypto/x509"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+)
+
+func main() {
+	certPool := x509.NewCertPool()
+	crt, _ := ioutil.ReadFile("./certs/myRoot.crt")
+	certPool.AppendCertsFromPEM(crt)
+	keyPair, _ := tls.LoadX509KeyPair("./certs/user.crt", "./certs/user.key")
+	clientCerts := []tls.Certificate{keyPair}
+	tlsConfig := &tls.Config{
+		RootCAs:      certPool,
+		Certificates: clientCerts,
+	}
+	transport := &http.Transport{
+		TLSClientConfig: tlsConfig,
+	}
+	client := http.Client{Transport: transport}
+	res, err := client.Get("https://test.example.private:8443")
+	if err != nil {
+		panic(err)
+	}
+	bites, err := ioutil.ReadAll(res.Body)
+	fmt.Printf("response is: %v", string(bites))
+}
diff --git a/microservices/http-client/main.go b/microservices/http-client/main.go
new file mode 100644
index 0000000..1953d1d
--- /dev/null
+++ b/microservices/http-client/main.go
@@ -0,0 +1,18 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"net/http"
+)
+
+func main() {
+	res, err := http.Get("https://google.com")
+	if err != nil {
+		panic(err)
+	}
+	defer res.Body.Close()
+	fmt.Println(res.Status)
+	bites, _ := ioutil.ReadAll(res.Body)
+	fmt.Println(string(bites))
+}
diff --git a/microservices/http-metod-matching/main.go b/microservices/http-metod-matching/main.go
new file mode 100644
index 0000000..380488b
--- /dev/null
+++ b/microservices/http-metod-matching/main.go
@@ -0,0 +1,16 @@
+package main
+
+import "net/http"
+
+func myHandler(res http.ResponseWriter, req *http.Request) {
+	if req.Method == http.MethodGet {
+		res.Write([]byte("Hello World"))
+	} else {
+		res.WriteHeader(http.StatusMethodNotAllowed)
+	}
+}
+
+func main() {
+	http.HandleFunc("/", myHandler)
+	http.ListenAndServe(":8080", nil)
+}
diff --git a/microservices/http-ratelimit/go.mod b/microservices/http-ratelimit/go.mod
new file mode 100644
index 0000000..3d84d42
--- /dev/null
+++ b/microservices/http-ratelimit/go.mod
@@ -0,0 +1,8 @@
+module golang.source-fellows.com/samples/ratelimit
+
+go 1.14
+
+require (
+	github.com/go-redis/redis/v7 v7.4.0
+	github.com/ulule/limiter/v3 v3.5.0
+)
diff --git a/microservices/http-ratelimit/go.sum b/microservices/http-ratelimit/go.sum
new file mode 100644
index 0000000..950307c
--- /dev/null
+++ b/microservices/http-ratelimit/go.sum
@@ -0,0 +1,65 @@
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
+github.com/gin-contrib/sse v0.1.0/go.mod h1:RHrZQHXnP2xjPF+u1gW/2HnVO7nvIa9PG3Gm+fLHvGI=
+github.com/gin-gonic/gin v1.6.2/go.mod h1:75u5sXoLsGZoRN5Sgbi1eraJ4GU3++wFwWzhwvtwp4M=
+github.com/go-playground/assert/v2 v2.0.1/go.mod h1:VDjEfimB/XKnb+ZQfWdccd7VUvScMdVu0Titje2rxJ4=
+github.com/go-playground/locales v0.13.0/go.mod h1:taPMhCMXrRLJO55olJkUXHZBHCxTMfnGwq/HNwmWNS8=
+github.com/go-playground/universal-translator v0.17.0/go.mod h1:UkSxE5sNxxRwHyU+Scu5vgOQjsIJAF8j9muTVoKLVtA=
+github.com/go-playground/validator/v10 v10.2.0/go.mod h1:uOYAAleCW8F/7oMFd6aG0GOhaH6EGOAJShg8Id5JGkI=
+github.com/go-redis/redis/v7 v7.2.0/go.mod h1:JDNMw23GTyLNC4GZu9njt15ctBQVn7xjRfnwdHj/Dcg=
+github.com/go-redis/redis/v7 v7.4.0 h1:7obg6wUoj05T0EpY0o8B59S9w5yeMWql7sw2kwNW1x4=
+github.com/go-redis/redis/v7 v7.4.0/go.mod h1:JDNMw23GTyLNC4GZu9njt15ctBQVn7xjRfnwdHj/Dcg=
+github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/golang/protobuf v1.3.3/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=
+github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
+github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
+github.com/json-iterator/go v1.1.9/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
+github.com/klauspost/compress v1.8.2/go.mod h1:RyIbtBH6LamlWaDj8nUwkbUhJ87Yi3uG0guNDohfE1A=
+github.com/klauspost/compress v1.9.6/go.mod h1:RyIbtBH6LamlWaDj8nUwkbUhJ87Yi3uG0guNDohfE1A=
+github.com/klauspost/cpuid v1.2.1/go.mod h1:Pj4uuM528wm8OyEC2QMXAi2YiTZ96dNQPGgoMS4s3ek=
+github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
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+github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
+github.com/leodido/go-urn v1.2.0/go.mod h1:+8+nEpDfqqsY+g338gtMEUOtuK+4dEMhiQEgxpxOKII=
+github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
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+github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
+github.com/onsi/ginkgo v1.10.1/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
+github.com/onsi/gomega v1.7.0/go.mod h1:ex+gbHU/CVuBBDIJjb2X0qEXbFg53c61hWP/1CpauHY=
+github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
+github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
+github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
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+gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
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+gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
diff --git a/microservices/http-ratelimit/main.go b/microservices/http-ratelimit/main.go
new file mode 100644
index 0000000..6db89c2
--- /dev/null
+++ b/microservices/http-ratelimit/main.go
@@ -0,0 +1,42 @@
+package main
+
+import (
+	"net/http"
+
+	libredis "github.com/go-redis/redis/v7"
+	"github.com/ulule/limiter/v3"
+	"github.com/ulule/limiter/v3/drivers/middleware/stdlib"
+	"github.com/ulule/limiter/v3/drivers/store/redis"
+)
+
+func handleRequest(res http.ResponseWriter, req *http.Request) {
+	res.Write([]byte("Hello World!"))
+}
+
+func rateLimitMiddleWare(handler http.HandlerFunc) http.Handler {
+	rate, err := limiter.NewRateFromFormatted("4-S")
+	if err != nil {
+		panic(err)
+	}
+	// Redis Client anlegen
+	option, err := libredis.ParseURL("redis://localhost:6379/0")
+	if err != nil {
+		panic(err)
+	}
+	client := libredis.NewClient(option)
+	// Store mit Redis konfigurieren
+	store, err := redis.NewStoreWithOptions(client, limiter.StoreOptions{
+		Prefix:   "limiter_http_example",
+		MaxRetry: 3,
+	})
+	if err != nil {
+		panic(err)
+	}
+	middleware := stdlib.NewMiddleware(limiter.New(store, rate, limiter.WithTrustForwardHeader(true)))
+	return middleware.Handler(handler)
+}
+
+func main() {
+	http.Handle("/", rateLimitMiddleWare(http.HandlerFunc(handleRequest)))
+	http.ListenAndServe(":8080", nil)
+}
diff --git a/microservices/http-registration/go.mod b/microservices/http-registration/go.mod
new file mode 100644
index 0000000..80ce972
--- /dev/null
+++ b/microservices/http-registration/go.mod
@@ -0,0 +1,3 @@
+module golang.source-fellows.com/samples/httpregistration
+
+go 1.13
diff --git a/microservices/http-registration/main.go b/microservices/http-registration/main.go
new file mode 100644
index 0000000..b344101
--- /dev/null
+++ b/microservices/http-registration/main.go
@@ -0,0 +1,21 @@
+package main
+
+import "net/http"
+
+type MyHandler struct{}
+
+func (mh *MyHandler) ServeHTTP(writer http.ResponseWriter, req *http.Request) {
+	writer.Write([]byte("Hello World (from ServeHTTP)"))
+}
+
+func handleHttp(res http.ResponseWriter, req *http.Request) {
+	res.Write([]byte("Hello World (from handleHttp)"))
+}
+
+func main() {
+	//Anmeldung der HandlerFunc Implementierung
+	http.HandleFunc("/func", handleHttp)
+	//Anmeldung der Handler Interface Implementierung
+	http.Handle("/handler", &MyHandler{})
+	http.ListenAndServe(":8080", &MyHandler{})
+}
diff --git a/microservices/http-retry/client/go.mod b/microservices/http-retry/client/go.mod
new file mode 100644
index 0000000..faeb606
--- /dev/null
+++ b/microservices/http-retry/client/go.mod
@@ -0,0 +1,5 @@
+module golang.source-fellows.com/samples/rfc7808/server
+
+go 1.13
+
+require github.com/hashicorp/go-retryablehttp v0.6.6
diff --git a/microservices/http-retry/client/go.sum b/microservices/http-retry/client/go.sum
new file mode 100644
index 0000000..fd16176
--- /dev/null
+++ b/microservices/http-retry/client/go.sum
@@ -0,0 +1,8 @@
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/hashicorp/go-cleanhttp v0.5.1 h1:dH3aiDG9Jvb5r5+bYHsikaOUIpcM0xvgMXVoDkXMzJM=
+github.com/hashicorp/go-cleanhttp v0.5.1/go.mod h1:JpRdi6/HCYpAwUzNwuwqhbovhLtngrth3wmdIIUrZ80=
+github.com/hashicorp/go-hclog v0.9.2/go.mod h1:5CU+agLiy3J7N7QjHK5d05KxGsuXiQLrjA0H7acj2lQ=
+github.com/hashicorp/go-retryablehttp v0.6.6 h1:HJunrbHTDDbBb/ay4kxa1n+dLmttUlnP3V9oNE4hmsM=
+github.com/hashicorp/go-retryablehttp v0.6.6/go.mod h1:vAew36LZh98gCBJNLH42IQ1ER/9wtLZZ8meHqQvEYWY=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
diff --git a/microservices/http-retry/client/main.go b/microservices/http-retry/client/main.go
new file mode 100644
index 0000000..494e4f8
--- /dev/null
+++ b/microservices/http-retry/client/main.go
@@ -0,0 +1,21 @@
+package main
+
+import (
+	"log"
+
+	"github.com/hashicorp/go-retryablehttp"
+)
+
+func main() {
+	retryClient := retryablehttp.NewClient()
+	retryClient.RetryMax = 10
+
+	standardClient := retryClient.StandardClient()
+
+	res, err := standardClient.Get("http://localhost:8080/")
+	if err != nil {
+		log.Fatal("could not request")
+	}
+	defer res.Body.Close()
+	log.Println(res.Status)
+}
diff --git a/microservices/http-retry/server/go.mod b/microservices/http-retry/server/go.mod
new file mode 100644
index 0000000..8ac8692
--- /dev/null
+++ b/microservices/http-retry/server/go.mod
@@ -0,0 +1,3 @@
+module golang.source-fellows.com/samples/httpretry/server
+
+go 1.13
diff --git a/microservices/http-retry/server/go.sum b/microservices/http-retry/server/go.sum
new file mode 100644
index 0000000..e69de29
diff --git a/microservices/http-retry/server/main.go b/microservices/http-retry/server/main.go
new file mode 100644
index 0000000..e569b9e
--- /dev/null
+++ b/microservices/http-retry/server/main.go
@@ -0,0 +1,26 @@
+package main
+
+import (
+	"fmt"
+	"net/http"
+)
+
+var count int = 0
+
+func handleHttp(res http.ResponseWriter, req *http.Request) {
+
+	responseStatus := http.StatusInternalServerError
+	if count%4 == 0 {
+		responseStatus = http.StatusOK
+	}
+	fmt.Printf("will return %v\n", responseStatus)
+	res.WriteHeader(responseStatus)
+
+	count++
+
+}
+
+func main() {
+	http.HandleFunc("/", handleHttp)
+	http.ListenAndServe(":8080", nil)
+}
diff --git a/microservices/httpsserver/README.md b/microservices/httpsserver/README.md
new file mode 100644
index 0000000..52e104d
--- /dev/null
+++ b/microservices/httpsserver/README.md
@@ -0,0 +1,16 @@
+Zertifikate erstellen
+=====================
+
+- Root Zertifikat erstellen:
+```
+openssl genrsa -out myRoot.key 2048
+openssl req -x509 -new -nodes -key myRoot.key -sha256 -days 3650 -out myRoot.crt
+```
+
+- Zertifikat für Server erstellen:
+```
+#CSR erstellen
+openssl req -new -sha256 -nodes -out test.example.csr -newkey rsa:2048 -keyout test.example.key -config server-cert.request.conf
+
+openssl x509 -req -in test.example.csr -CA myRoot.crt -CAkey myRoot.key -CAcreateserial -extfile test.example.ext.cnf -out test.example.crt -days 3650 -sha256
+```
\ No newline at end of file
diff --git a/microservices/httpsserver/certs/myRoot.crt b/microservices/httpsserver/certs/myRoot.crt
new file mode 100644
index 0000000..242eadf
--- /dev/null
+++ b/microservices/httpsserver/certs/myRoot.crt
@@ -0,0 +1,21 @@
+-----BEGIN CERTIFICATE-----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+SeTbMB8GA1UdIwQYMBaAFO3om6AZ9q/+r6kXo7hAhOBDSeTbMA8GA1UdEwEB/wQF
+MAMBAf8wDQYJKoZIhvcNAQELBQADggEBAMxKFUWYTQz/ACVY8lV18QCGxcvNj3Uz
+ZdtNUEDkxu6yKsl+1otREbuxqnfNjrGLmlLQfU/GlY+PCF85SYm1Ep4yKdZ7J+1c
+MG+PB5NS3cV7BnoJ6WnXk7KJRX+dYpCr+jQmQbtTshk6dM2a6THjyPzKkyDflcfM
+tXQROGDG9O/5DvF8Eqz13Gel5Wukept9mHtDHapU0BooFTXNqh+tPmFU76tKCQZV
+h0Qt9BC8A6bDEaULVlXpvNTuDCrCMGhiYEo2++PD/e5YT1UDVNSokanyFIUoCJAn
+X5u+VjRfaVibiWu8E63qoKv+oXBf9pwlNeE8KBlydzf5OQgx8FEkbfc=
+-----END CERTIFICATE-----
diff --git a/microservices/httpsserver/certs/myRoot.key b/microservices/httpsserver/certs/myRoot.key
new file mode 100644
index 0000000..a018d60
--- /dev/null
+++ b/microservices/httpsserver/certs/myRoot.key
@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----
+MIIEowIBAAKCAQEA1j7HYqtTj3nTqF4SHazRDm9ONdRs/nzXikeGUnjdfentBgxs
+n8EG6fEsDdrwa+66SAPVbGvRPS4ejn8wvFGHqvVMTLzQgClSzIJwA7eN1Ma0iviJ
+5ucA4v8PDRMZYNHKXlJkLCgGxVI58KgnIyz7KAH4EsT7TkOrkXADcKnE/mvrt58G
+ljZj1u7WJcALXv2sZpW+0szdnLkb61DRowlg6pVHq29KutiDjiAmIzbvS7o6zzRX
+vbd8+0RS8psdA6lmiV4daxu5nUVt1AFycna7dsj3d7BAC+pDe2M6qB6WXmfuQnUH
+dWOTxtXN1rXM8of29y8XR9yBd0+tU7MEJrlK7wIDAQABAoIBAQC0GzaWthybAvly
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+/oJYSdohufYIIVx6YNz8eMQLlEys7BcAs9uDbfrEh2lhSCRd+eVER/p2U+EE3YFe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+-----END RSA PRIVATE KEY-----
diff --git a/microservices/httpsserver/certs/myRoot.srl b/microservices/httpsserver/certs/myRoot.srl
new file mode 100644
index 0000000..5a814b7
--- /dev/null
+++ b/microservices/httpsserver/certs/myRoot.srl
@@ -0,0 +1 @@
+73771BE66A4800A9EBDEF9018EBEDCDB7701BCC7
diff --git a/microservices/httpsserver/certs/server-cert.conf b/microservices/httpsserver/certs/server-cert.conf
new file mode 100644
index 0000000..59c110b
--- /dev/null
+++ b/microservices/httpsserver/certs/server-cert.conf
@@ -0,0 +1,6 @@
+authorityKeyIdentifier=keyid,issuer
+basicConstraints=CA:FALSE
+keyUsage = digitalSignature, nonRepudiation, keyEncipherment, dataEncipherment
+subjectAltName = @alt_names
+[alt_names]
+DNS.1 = test.example.private
\ No newline at end of file
diff --git a/microservices/httpsserver/certs/server-cert.request.conf b/microservices/httpsserver/certs/server-cert.request.conf
new file mode 100644
index 0000000..09d661e
--- /dev/null
+++ b/microservices/httpsserver/certs/server-cert.request.conf
@@ -0,0 +1,12 @@
+[req]
+distinguished_name = dn
+default_bits = 2048
+prompt = no
+default_md = sha256
+[dn]
+C=DE
+ST=BW
+L=Reutlingen
+O=Source Fellows GmbH
+emailAddress=webmaster@example.private
+CN = test.example.private
\ No newline at end of file
diff --git a/microservices/httpsserver/certs/test.example.crt b/microservices/httpsserver/certs/test.example.crt
new file mode 100644
index 0000000..73ad419
--- /dev/null
+++ b/microservices/httpsserver/certs/test.example.crt
@@ -0,0 +1,23 @@
+-----BEGIN CERTIFICATE-----
+MIID0zCCArugAwIBAgIUc3cb5mpIAKnr3vkBjr7c23cBvMcwDQYJKoZIhvcNAQEL
+BQAwUjELMAkGA1UEBhMCREUxEDAOBgNVBAgMB0JhV8ODwrwxEzARBgNVBAcMClJl
+dXRsaW5nZW4xHDAaBgNVBAoME1NvdXJjZSBGZWxsb3dzIEdtYkgwHhcNMjAwNzA4
+MDQwNzA0WhcNMzAwNzA2MDQwNzA0WjCBljELMAkGA1UEBhMCREUxCzAJBgNVBAgM
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+1czr5l2cw0VXAcgVDu3qQIOtvYtCkUZO57436UNHKE3uT3gLzzAKRxfrS8LbVG2H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+-----END CERTIFICATE-----
diff --git a/microservices/httpsserver/certs/test.example.csr b/microservices/httpsserver/certs/test.example.csr
new file mode 100644
index 0000000..a4e9fc9
--- /dev/null
+++ b/microservices/httpsserver/certs/test.example.csr
@@ -0,0 +1,18 @@
+-----BEGIN CERTIFICATE REQUEST-----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+-----END CERTIFICATE REQUEST-----
diff --git a/microservices/httpsserver/certs/test.example.key b/microservices/httpsserver/certs/test.example.key
new file mode 100644
index 0000000..07ee56b
--- /dev/null
+++ b/microservices/httpsserver/certs/test.example.key
@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----
+MIIEvgIBADANBgkqhkiG9w0BAQEFAASCBKgwggSkAgEAAoIBAQCuOgM0ykMvv0hX
+rHh20WW7kGZ2M5yI4lluewNnRgkoNrbiNPNdZVeRcezDJTxHbxzsnMIOu/ITA78C
+7+Rr2UINOj8/670cUpbOoPktHTwBhDT4DWlg6lWvBufBVXc33tTRUWC73/6GhV5B
+Olib3YFR7maDY9SK46gUDKBUTQXrmySRzRCWYV+SnTFqhcSQTOIw817dT1CBYHhW
+7Th55yuv9YGusl77b7rEv9bWWGaTadXM6+ZdnMNFVwHIFQ7t6kCDrb2LQpFGTue+
+N+lDRyhN7k94C88wCkcX60vC21Rth1fNnU+aK++2z09jfxsjycFoM4udMiH1+76U
+Zkzx4qbdAgMBAAECggEBAJOAUc6TnqYBz4FKZwJQ7UwKSHSx5UiOOSCrzInWZVJC
+YDrKkW70qVpdlRDxqULg8x/u5uwKejtW5JPb/QrBeIYyVfIL5qLf2QU+izaClZbD
+EwUedaSzP69arUKk1LXcVViRCNCGJrpElzOp7fKnaSCwMOHz1rFvY5D1z5cPTn/U
+Bsa0r2tGRtEfuUMfceMFaR5BnqJRjP8TuwscoqlOO/bBC1N5lGahJ77dlUB5L1QS
+98Ajwgnsl4QZTqhkoVkAPf3jG5rogF9tJQfBdxHPTUaWawE8GnBcUricq4fjhUA3
+b6zZVyvjI8dPI02UZdkkdTsOpRkXQJ1pz36hypu5GIECgYEA36KivMvoe8fOuzCc
+bnMdT7mCvd77y+m4u0lT8kbCi+HKuGUgYQpCKx9ifIuW9CtdG8YwbWw0Z6QxvfSV
+rTdN/23zDQco5uHe5miLQDVyn3LuAbkYkmKTe3V3Y2XkRL1zptAZ82XBWa3aw6+j
+rIoKRCJ9jLrrGIuFNyU9YevCAPkCgYEAx3DbRXzlEWF3uiYWMpy37DfwgTs6vCjq
+0MAyW03hn7oZ3waghGjuJ5LiYaC/kLk1JUbjCBQEvtgyAVJ6AMatkgWmMlyMjlu8
+480gjLDbiJafvFpaExclK3iZDvhUhBunBje8hIGpWw637MbQB2z7bDiuhTTKp8zb
+pN5/YKwoMgUCgYEA1g9rrEGV/92KkXz/T22akfRlI+9rn4zRSVvwIYj/sTtoesY5
+jwltuq8o60QGMyPK1MoJEsQvCUGOZ1/VYV79ptCMhFzlFtL/NBa/q689T0iIb1fI
+IF6BAvy2UYt3SyD4saSiImu0/m0+aG8XwRDEsOE+wdUtMWpjEhzwO2maYqkCgYA6
+M2f5tkHOuafLzdOKf4t4xrZLsDIquLIVqxDG7kpaZ1+nYvKy0UA2kjm4DcX5gOLO
+dwpH0De2TbcCBcSOt2vtgfKHHdTysjjELZdDF1VpXbNNrvw8N/Pj5LSd1sArMTqj
+qN49uOzoIrpvwXDxyc7xPPVI8Cf3oeOzEC8R0guE1QKBgG1kyv5p2CfE26aL3+eO
+o9VAY36Fr/oM74wBySC9J22G9a0oNegW3eEuGvnGMRc4fkSoIlJjqA53on0OcG3h
+Eua1qz02v6LpIKs3RvmlY/PFfv3TosVjQQXnEH8XRBVqPIVI9xwP1GbjWYE2kKMq
+VM8bquSy+WIsUuD0eFhnx+rC
+-----END PRIVATE KEY-----
diff --git a/microservices/httpsserver/go.mod b/microservices/httpsserver/go.mod
new file mode 100644
index 0000000..d1ec280
--- /dev/null
+++ b/microservices/httpsserver/go.mod
@@ -0,0 +1,5 @@
+module golang.source-fellows.com/samples/https/server
+
+go 1.14
+
+require golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9
diff --git a/microservices/httpsserver/go.sum b/microservices/httpsserver/go.sum
new file mode 100644
index 0000000..e7a8df9
--- /dev/null
+++ b/microservices/httpsserver/go.sum
@@ -0,0 +1,9 @@
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9 h1:psW17arqaxU48Z5kZ0CQnkZWQJsqcURM6tKiBApRjXI=
+golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
+golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3 h1:0GoQqolDA55aaLxZyTzK/Y2ePZzZTUrRacwib7cNsYQ=
+golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
diff --git a/microservices/httpsserver/main.go b/microservices/httpsserver/main.go
new file mode 100644
index 0000000..4f8001a
--- /dev/null
+++ b/microservices/httpsserver/main.go
@@ -0,0 +1,19 @@
+package main
+
+import (
+	"fmt"
+	"net/http"
+)
+
+func main() {
+
+	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		fmt.Fprintln(w, "Hello World")
+	})
+
+	certFile := "./certs/test.example.crt"
+	keyFile := "./certs/test.example.key"
+
+	http.ListenAndServeTLS(":8443", certFile, keyFile, nil)
+
+}
diff --git a/microservices/httpsservercert/README.md b/microservices/httpsservercert/README.md
new file mode 100644
index 0000000..3e02d69
--- /dev/null
+++ b/microservices/httpsservercert/README.md
@@ -0,0 +1,46 @@
+Zertifikate erstellen
+=====================
+
+AUSFÜHRE IM cert VERZEICHNIS
+
+- Root Zertifikat erstellen:
+```
+openssl genrsa -out myRoot.key 2048
+openssl req -x509 -new -nodes -key myRoot.key -sha256 -days 3650 -out myRoot.crt
+```
+
+- Zertifikat für Server erstellen:
+```
+#CSR erstellen
+openssl req -new -sha256 -nodes -out test.example.csr -newkey rsa:2048 -keyout test.example.key -config server-cert.request.conf
+
+openssl x509 -req -in test.example.csr -CA myRoot.crt -CAkey myRoot.key -CAcreateserial -out test.example.crt -days 3650 -sha256
+```
+
+-CA anlegen
+```
+mkdir -p ca/certsdb
+touch ca/index.txt
+touch ca/index.txt.attr
+echo '01' > ca/serial
+```
+
+- Client-Zertifikat erstellen
+
+```
+openssl genrsa -des3 -out user.key # key is 1234
+openssl req -new -key user.key -out user.req -config user-cert.request.conf
+openssl ca -cert test.example.crt -keyfile test.example.key -out user.crt -in user.req -config user-cert.conf
+openssl pkcs12 -export -in user.crt -inkey user.key -out user-client.p12
+```
+
+- Chain
+
+```
+cat
+```
+
+- Curl
+```
+curl --cacert ./certs/myRoot.crt --cert ./certs/user.crt --key ./certs/user.key -v https://test.example.private:8443
+```
\ No newline at end of file
diff --git a/microservices/httpsservercert/certs/ca/certsdb/01.pem b/microservices/httpsservercert/certs/ca/certsdb/01.pem
new file mode 100644
index 0000000..1844631
--- /dev/null
+++ b/microservices/httpsservercert/certs/ca/certsdb/01.pem
@@ -0,0 +1,71 @@
+Certificate:
+    Data:
+        Version: 1 (0x0)
+        Serial Number: 1 (0x1)
+        Signature Algorithm: sha1WithRSAEncryption
+        Issuer: C=DE, ST=BW, L=Reutlingen, O=Source Fellows GmbH/emailAddress=webmaster@example.private, CN=test.example.private
+        Validity
+            Not Before: Jul  9 04:15:47 2020 GMT
+            Not After : Jul  9 04:15:47 2021 GMT
+        Subject: C=DE, ST=BW, L=Reutlingen, O=Source Fellows GmbH, CN=test.example.private/emailAddress=user@example.private
+        Subject Public Key Info:
+            Public Key Algorithm: rsaEncryption
+                RSA Public-Key: (2048 bit)
+                Modulus:
+                    00:e3:a9:b6:c5:35:06:6d:12:ee:e7:ee:60:89:49:
+                    2a:ac:b2:be:3d:f7:c5:4d:55:08:fc:80:43:aa:fd:
+                    05:6c:43:94:a5:02:c9:1f:fc:70:c4:44:85:5a:b8:
+                    f9:95:f8:8a:5c:2e:12:55:43:23:f2:d0:34:c3:a4:
+                    41:89:14:a9:d1:19:d4:0d:d0:58:87:38:9f:6c:1d:
+                    89:2d:23:60:8f:9e:af:f4:5a:f0:d0:a4:fd:4a:49:
+                    9b:19:df:97:20:db:80:7b:ee:f2:ba:e7:9a:b4:3c:
+                    48:74:9c:57:61:0b:4e:ee:eb:53:5d:ca:3d:9e:f3:
+                    d2:d5:1a:f7:7a:34:1d:09:73:44:1c:af:3d:31:72:
+                    90:e9:43:0b:b3:c9:30:58:21:df:27:5b:39:42:85:
+                    f1:ec:d9:1c:89:38:64:92:d6:da:f9:22:c1:e9:b5:
+                    22:bf:3a:32:10:f9:e3:e6:b3:73:1d:d2:7e:a9:a6:
+                    27:86:83:8c:7e:9d:4f:39:d0:53:45:0b:f7:89:8b:
+                    f2:8c:43:44:42:a9:4a:81:83:60:bb:1f:63:f5:75:
+                    fa:73:3b:85:c9:62:7d:1d:8a:61:4c:3c:f9:23:a3:
+                    3d:97:78:6f:6d:13:db:88:79:fb:89:0b:3e:a6:50:
+                    b8:72:9a:c8:d3:7b:d2:ec:6c:15:3d:ab:f7:8b:c8:
+                    50:9b
+                Exponent: 65537 (0x10001)
+    Signature Algorithm: sha1WithRSAEncryption
+         95:b9:66:f0:95:05:82:2c:9b:f6:85:ea:68:7c:ae:18:b5:d1:
+         12:10:22:2f:2f:1f:5f:d8:15:b6:b3:87:4a:dc:b1:1c:1d:c3:
+         8c:80:2f:cb:d2:bd:36:35:53:27:20:c0:b8:5f:58:92:8e:60:
+         2a:01:f1:08:38:d0:97:6f:4f:a1:57:17:e7:b9:fc:e1:67:7a:
+         97:1b:b3:e1:36:26:06:b2:32:9d:5a:12:4b:2d:b7:0b:8b:c8:
+         09:bc:5c:b1:8f:f8:42:24:97:10:6d:6a:eb:82:99:0a:bf:e8:
+         fe:9c:1d:52:f2:2d:78:18:a4:9f:33:27:88:54:86:09:11:0e:
+         fd:d5:5c:0d:65:c4:78:bd:cc:2f:34:59:e0:13:e8:02:ed:98:
+         c4:9e:7f:5e:f7:9b:18:d1:c6:76:eb:1b:dc:76:6a:a6:ab:f3:
+         b5:8f:b5:0a:ad:cf:07:d5:cf:6c:69:ae:0c:f5:dc:f2:b2:11:
+         2b:b2:b6:a5:b5:63:6b:1f:0d:7b:cd:07:81:59:40:5e:12:c9:
+         41:73:cf:08:87:3c:ab:38:51:27:c2:ad:c6:57:20:dc:bd:fe:
+         cf:ea:b5:37:29:be:c1:f4:9b:61:ad:a3:f8:5c:d7:7b:65:2e:
+         80:f9:6b:dd:42:a8:62:ae:52:0d:95:f7:67:04:10:b9:97:24:
+         48:33:fb:22
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/microservices/httpsservercert/certs/ca/index.txt b/microservices/httpsservercert/certs/ca/index.txt
new file mode 100644
index 0000000..27662dd
--- /dev/null
+++ b/microservices/httpsservercert/certs/ca/index.txt
@@ -0,0 +1 @@
+V	210709041547Z		01	unknown	/C=DE/ST=BW/L=Reutlingen/O=Source Fellows GmbH/CN=test.example.private/emailAddress=user@example.private
diff --git a/microservices/httpsservercert/certs/ca/index.txt.attr b/microservices/httpsservercert/certs/ca/index.txt.attr
new file mode 100644
index 0000000..8f7e63a
--- /dev/null
+++ b/microservices/httpsservercert/certs/ca/index.txt.attr
@@ -0,0 +1 @@
+unique_subject = yes
diff --git a/microservices/httpsservercert/certs/ca/index.txt.attr.old b/microservices/httpsservercert/certs/ca/index.txt.attr.old
new file mode 100644
index 0000000..e69de29
diff --git a/microservices/httpsservercert/certs/ca/index.txt.old b/microservices/httpsservercert/certs/ca/index.txt.old
new file mode 100644
index 0000000..e69de29
diff --git a/microservices/httpsservercert/certs/ca/serial b/microservices/httpsservercert/certs/ca/serial
new file mode 100644
index 0000000..9e22bcb
--- /dev/null
+++ b/microservices/httpsservercert/certs/ca/serial
@@ -0,0 +1 @@
+02
diff --git a/microservices/httpsservercert/certs/ca/serial.old b/microservices/httpsservercert/certs/ca/serial.old
new file mode 100644
index 0000000..8a0f05e
--- /dev/null
+++ b/microservices/httpsservercert/certs/ca/serial.old
@@ -0,0 +1 @@
+01
diff --git a/microservices/httpsservercert/certs/myRoot.crt b/microservices/httpsservercert/certs/myRoot.crt
new file mode 100644
index 0000000..242eadf
--- /dev/null
+++ b/microservices/httpsservercert/certs/myRoot.crt
@@ -0,0 +1,21 @@
+-----BEGIN CERTIFICATE-----
+MIIDhTCCAm2gAwIBAgIUS7TqIYrkdb2kEmtuawe8h/54VVIwDQYJKoZIhvcNAQEL
+BQAwUjELMAkGA1UEBhMCREUxEDAOBgNVBAgMB0JhV8ODwrwxEzARBgNVBAcMClJl
+dXRsaW5nZW4xHDAaBgNVBAoME1NvdXJjZSBGZWxsb3dzIEdtYkgwHhcNMjAwNzA4
+MDM1ODE4WhcNMzAwNzA2MDM1ODE4WjBSMQswCQYDVQQGEwJERTEQMA4GA1UECAwH
+QmFXw4PCvDETMBEGA1UEBwwKUmV1dGxpbmdlbjEcMBoGA1UECgwTU291cmNlIEZl
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+X5u+VjRfaVibiWu8E63qoKv+oXBf9pwlNeE8KBlydzf5OQgx8FEkbfc=
+-----END CERTIFICATE-----
diff --git a/microservices/httpsservercert/certs/myRoot.key b/microservices/httpsservercert/certs/myRoot.key
new file mode 100644
index 0000000..a018d60
--- /dev/null
+++ b/microservices/httpsservercert/certs/myRoot.key
@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----
+MIIEowIBAAKCAQEA1j7HYqtTj3nTqF4SHazRDm9ONdRs/nzXikeGUnjdfentBgxs
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+wcEp3pm+ub20bZBdFoxP15X3IisUGiQcrg/q4ZGHxOvJuzI9q4b0
+-----END RSA PRIVATE KEY-----
diff --git a/microservices/httpsservercert/certs/myRoot.srl b/microservices/httpsservercert/certs/myRoot.srl
new file mode 100644
index 0000000..ad3cbeb
--- /dev/null
+++ b/microservices/httpsservercert/certs/myRoot.srl
@@ -0,0 +1 @@
+73771BE66A4800A9EBDEF9018EBEDCDB7701BCC8
diff --git a/microservices/httpsservercert/certs/server-cert.conf b/microservices/httpsservercert/certs/server-cert.conf
new file mode 100644
index 0000000..306506a
--- /dev/null
+++ b/microservices/httpsservercert/certs/server-cert.conf
@@ -0,0 +1,6 @@
+authorityKeyIdentifier=keyid,issuer
+basicConstraints=CA:FALSE
+keyUsage = digitalSignature, nonRepudiation, keyEncipherment, dataEncipherment, keyCertSign
+subjectAltName = @alt_names
+[alt_names]
+DNS.1 = test.example.private
\ No newline at end of file
diff --git a/microservices/httpsservercert/certs/server-cert.request.conf b/microservices/httpsservercert/certs/server-cert.request.conf
new file mode 100644
index 0000000..09d661e
--- /dev/null
+++ b/microservices/httpsservercert/certs/server-cert.request.conf
@@ -0,0 +1,12 @@
+[req]
+distinguished_name = dn
+default_bits = 2048
+prompt = no
+default_md = sha256
+[dn]
+C=DE
+ST=BW
+L=Reutlingen
+O=Source Fellows GmbH
+emailAddress=webmaster@example.private
+CN = test.example.private
\ No newline at end of file
diff --git a/microservices/httpsservercert/certs/server-chain.crt b/microservices/httpsservercert/certs/server-chain.crt
new file mode 100644
index 0000000..2fc88c8
--- /dev/null
+++ b/microservices/httpsservercert/certs/server-chain.crt
@@ -0,0 +1,42 @@
+-----BEGIN CERTIFICATE-----
+MIIDhTCCAm2gAwIBAgIUS7TqIYrkdb2kEmtuawe8h/54VVIwDQYJKoZIhvcNAQEL
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+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----
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+LrQLEceRlUveswrFdPYZYVQq2gc=
+-----END CERTIFICATE-----
diff --git a/microservices/httpsservercert/certs/test.example.crt b/microservices/httpsservercert/certs/test.example.crt
new file mode 100644
index 0000000..caaa4fa
--- /dev/null
+++ b/microservices/httpsservercert/certs/test.example.crt
@@ -0,0 +1,21 @@
+-----BEGIN CERTIFICATE-----
+MIIDcDCCAlgCFHN3G+ZqSACp6975AY6+3Nt3AbzIMA0GCSqGSIb3DQEBCwUAMFIx
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+LrQLEceRlUveswrFdPYZYVQq2gc=
+-----END CERTIFICATE-----
diff --git a/microservices/httpsservercert/certs/test.example.csr b/microservices/httpsservercert/certs/test.example.csr
new file mode 100644
index 0000000..9d3b8ec
--- /dev/null
+++ b/microservices/httpsservercert/certs/test.example.csr
@@ -0,0 +1,18 @@
+-----BEGIN CERTIFICATE REQUEST-----
+MIIC3DCCAcQCAQAwgZYxCzAJBgNVBAYTAkRFMQswCQYDVQQIDAJCVzETMBEGA1UE
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+Bmogwc3Y5xduKsqkSxWNEw==
+-----END CERTIFICATE REQUEST-----
diff --git a/microservices/httpsservercert/certs/test.example.key b/microservices/httpsservercert/certs/test.example.key
new file mode 100644
index 0000000..bacb8f4
--- /dev/null
+++ b/microservices/httpsservercert/certs/test.example.key
@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----
+MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQDEff9ZynNlYbqj
+TSl77iLejkEwkZuByBwW90CSNcU4GvYnBkiJphUGCV0ifZzEbs+a+AFi9n4AUeA6
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+KTrAWWyykNup7GJd4un8dNc=
+-----END PRIVATE KEY-----
diff --git a/microservices/httpsservercert/certs/user-cert.conf b/microservices/httpsservercert/certs/user-cert.conf
new file mode 100644
index 0000000..2e3dc14
--- /dev/null
+++ b/microservices/httpsservercert/certs/user-cert.conf
@@ -0,0 +1,28 @@
+authorityKeyIdentifier=keyid,issuer
+basicConstraints=CA:FALSE
+keyUsage = digitalSignature, nonRepudiation, keyEncipherment, dataEncipherment
+default_days    = 365
+[ca]
+default_ca = CA_default
+[ CA_default ]
+dir = ca
+certs		= $dir/certsdb
+new_certs_dir	= $certs
+database	= $dir/index.txt
+certificate	= $dir/cacert.pem
+private_key	= $dir/private/cakey.pem
+serial		= $dir/serial
+crldir		= $dir/crl
+crlnumber	= $dir/crlnumber
+crl		= $crldir/crl.pem
+RANDFILE	= $dir/private/.rand
+default_md      = sha1
+policy          = policy_match
+[ policy_match ]
+countryName             = match
+stateOrProvinceName     = match
+localityName            = supplied
+organizationName        = match
+organizationalUnitName  = optional
+commonName              = supplied
+emailAddress            = optional
\ No newline at end of file
diff --git a/microservices/httpsservercert/certs/user-cert.request.conf b/microservices/httpsservercert/certs/user-cert.request.conf
new file mode 100644
index 0000000..75449bf
--- /dev/null
+++ b/microservices/httpsservercert/certs/user-cert.request.conf
@@ -0,0 +1,12 @@
+[req]
+distinguished_name = dn
+default_bits = 2048
+prompt = no
+default_md = sha256
+[dn]
+C=DE
+ST=BW
+L=Reutlingen
+O=Source Fellows GmbH
+emailAddress=user@example.private
+CN = test.example.private
\ No newline at end of file
diff --git a/microservices/httpsservercert/certs/user-client.p12 b/microservices/httpsservercert/certs/user-client.p12
new file mode 100644
index 0000000..9bfe53c
Binary files /dev/null and b/microservices/httpsservercert/certs/user-client.p12 differ
diff --git a/microservices/httpsservercert/certs/user.crt b/microservices/httpsservercert/certs/user.crt
new file mode 100644
index 0000000..1844631
--- /dev/null
+++ b/microservices/httpsservercert/certs/user.crt
@@ -0,0 +1,71 @@
+Certificate:
+    Data:
+        Version: 1 (0x0)
+        Serial Number: 1 (0x1)
+        Signature Algorithm: sha1WithRSAEncryption
+        Issuer: C=DE, ST=BW, L=Reutlingen, O=Source Fellows GmbH/emailAddress=webmaster@example.private, CN=test.example.private
+        Validity
+            Not Before: Jul  9 04:15:47 2020 GMT
+            Not After : Jul  9 04:15:47 2021 GMT
+        Subject: C=DE, ST=BW, L=Reutlingen, O=Source Fellows GmbH, CN=test.example.private/emailAddress=user@example.private
+        Subject Public Key Info:
+            Public Key Algorithm: rsaEncryption
+                RSA Public-Key: (2048 bit)
+                Modulus:
+                    00:e3:a9:b6:c5:35:06:6d:12:ee:e7:ee:60:89:49:
+                    2a:ac:b2:be:3d:f7:c5:4d:55:08:fc:80:43:aa:fd:
+                    05:6c:43:94:a5:02:c9:1f:fc:70:c4:44:85:5a:b8:
+                    f9:95:f8:8a:5c:2e:12:55:43:23:f2:d0:34:c3:a4:
+                    41:89:14:a9:d1:19:d4:0d:d0:58:87:38:9f:6c:1d:
+                    89:2d:23:60:8f:9e:af:f4:5a:f0:d0:a4:fd:4a:49:
+                    9b:19:df:97:20:db:80:7b:ee:f2:ba:e7:9a:b4:3c:
+                    48:74:9c:57:61:0b:4e:ee:eb:53:5d:ca:3d:9e:f3:
+                    d2:d5:1a:f7:7a:34:1d:09:73:44:1c:af:3d:31:72:
+                    90:e9:43:0b:b3:c9:30:58:21:df:27:5b:39:42:85:
+                    f1:ec:d9:1c:89:38:64:92:d6:da:f9:22:c1:e9:b5:
+                    22:bf:3a:32:10:f9:e3:e6:b3:73:1d:d2:7e:a9:a6:
+                    27:86:83:8c:7e:9d:4f:39:d0:53:45:0b:f7:89:8b:
+                    f2:8c:43:44:42:a9:4a:81:83:60:bb:1f:63:f5:75:
+                    fa:73:3b:85:c9:62:7d:1d:8a:61:4c:3c:f9:23:a3:
+                    3d:97:78:6f:6d:13:db:88:79:fb:89:0b:3e:a6:50:
+                    b8:72:9a:c8:d3:7b:d2:ec:6c:15:3d:ab:f7:8b:c8:
+                    50:9b
+                Exponent: 65537 (0x10001)
+    Signature Algorithm: sha1WithRSAEncryption
+         95:b9:66:f0:95:05:82:2c:9b:f6:85:ea:68:7c:ae:18:b5:d1:
+         12:10:22:2f:2f:1f:5f:d8:15:b6:b3:87:4a:dc:b1:1c:1d:c3:
+         8c:80:2f:cb:d2:bd:36:35:53:27:20:c0:b8:5f:58:92:8e:60:
+         2a:01:f1:08:38:d0:97:6f:4f:a1:57:17:e7:b9:fc:e1:67:7a:
+         97:1b:b3:e1:36:26:06:b2:32:9d:5a:12:4b:2d:b7:0b:8b:c8:
+         09:bc:5c:b1:8f:f8:42:24:97:10:6d:6a:eb:82:99:0a:bf:e8:
+         fe:9c:1d:52:f2:2d:78:18:a4:9f:33:27:88:54:86:09:11:0e:
+         fd:d5:5c:0d:65:c4:78:bd:cc:2f:34:59:e0:13:e8:02:ed:98:
+         c4:9e:7f:5e:f7:9b:18:d1:c6:76:eb:1b:dc:76:6a:a6:ab:f3:
+         b5:8f:b5:0a:ad:cf:07:d5:cf:6c:69:ae:0c:f5:dc:f2:b2:11:
+         2b:b2:b6:a5:b5:63:6b:1f:0d:7b:cd:07:81:59:40:5e:12:c9:
+         41:73:cf:08:87:3c:ab:38:51:27:c2:ad:c6:57:20:dc:bd:fe:
+         cf:ea:b5:37:29:be:c1:f4:9b:61:ad:a3:f8:5c:d7:7b:65:2e:
+         80:f9:6b:dd:42:a8:62:ae:52:0d:95:f7:67:04:10:b9:97:24:
+         48:33:fb:22
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/microservices/httpsservercert/certs/user.key b/microservices/httpsservercert/certs/user.key
new file mode 100644
index 0000000..24ecb98
--- /dev/null
+++ b/microservices/httpsservercert/certs/user.key
@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----
diff --git a/microservices/httpsservercert/certs/user.req b/microservices/httpsservercert/certs/user.req
new file mode 100644
index 0000000..cddf1aa
--- /dev/null
+++ b/microservices/httpsservercert/certs/user.req
@@ -0,0 +1,18 @@
+-----BEGIN CERTIFICATE REQUEST-----
+MIIC1zCCAb8CAQAwgZExCzAJBgNVBAYTAkRFMQswCQYDVQQIDAJCVzETMBEGA1UE
+BwwKUmV1dGxpbmdlbjEcMBoGA1UECgwTU291cmNlIEZlbGxvd3MgR21iSDEjMCEG
+CSqGSIb3DQEJARYUdXNlckBleGFtcGxlLnByaXZhdGUxHTAbBgNVBAMMFHRlc3Qu
+ZXhhbXBsZS5wcml2YXRlMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA
+46m2xTUGbRLu5+5giUkqrLK+PffFTVUI/IBDqv0FbEOUpQLJH/xwxESFWrj5lfiK
+XC4SVUMj8tA0w6RBiRSp0RnUDdBYhzifbB2JLSNgj56v9Frw0KT9SkmbGd+XINuA
+e+7yuueatDxIdJxXYQtO7utTXco9nvPS1Rr3ejQdCXNEHK89MXKQ6UMLs8kwWCHf
+J1s5QoXx7NkciThkktba+SLB6bUivzoyEPnj5rNzHdJ+qaYnhoOMfp1POdBTRQv3
+iYvyjENEQqlKgYNgux9j9XX6czuFyWJ9HYphTDz5I6M9l3hvbRPbiHn7iQs+plC4
+cprI03vS7GwVPav3i8hQmwIDAQABoAAwDQYJKoZIhvcNAQELBQADggEBAJ2ZHvrq
+QE8yoiOSb+itUtWLo86T+qbSwHLy9Ned0wtu1XiL7ltJATyRwMbv1RduGcfYWBcx
+ZcUAcqYhsuSTM3MPg0MQvAFrLRwonq+TN6zq0K7RvZ5FSCizzcyThJIRcCtUNd0y
+heqknhsvnkIwSQCb4RPF3/57FXct1FNEHEKMtldWEHCkKbJnUtt9Z/4WEkmTCvzi
+EYwcwoK6QsmJOIwQXzOYniaPf2k8oeBLu81sq5GG5vRZvs9dFX6HQmfQ28oKeMCy
+8n6XGHPudNybKBykvYzRKbChVl6LiFdz1f95x5JSh+aJx8Ca8mq5NpFK0TJEzQWv
+NUvFSnG7X4w6JJg=
+-----END CERTIFICATE REQUEST-----
diff --git a/microservices/httpsservercert/go.mod b/microservices/httpsservercert/go.mod
new file mode 100644
index 0000000..8247d66
--- /dev/null
+++ b/microservices/httpsservercert/go.mod
@@ -0,0 +1,3 @@
+module golang.source-fellows.com/samples/https/servercert
+
+go 1.14
diff --git a/microservices/httpsservercert/main.go b/microservices/httpsservercert/main.go
new file mode 100644
index 0000000..bc446c5
--- /dev/null
+++ b/microservices/httpsservercert/main.go
@@ -0,0 +1,35 @@
+package main
+
+import (
+	"crypto/tls"
+	"crypto/x509"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"net/http"
+)
+
+func main() {
+	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		fmt.Fprintln(w, "Hello World")
+	})
+
+	certPool := x509.NewCertPool()
+	pem, err := ioutil.ReadFile("certs/server-chain.crt")
+	if err != nil {
+		panic(err)
+	}
+	certPool.AppendCertsFromPEM(pem)
+
+	tlsConfig := &tls.Config{
+		ClientAuth: tls.RequireAndVerifyClientCert,
+		ClientCAs:  certPool,
+	}
+
+	srv := http.Server{
+		Addr:      ":8443",
+		TLSConfig: tlsConfig,
+	}
+
+	log.Fatal(srv.ListenAndServeTLS("certs/test.example.crt", "certs/test.example.key"))
+}
diff --git a/microservices/httpsservercert/test.example.key b/microservices/httpsservercert/test.example.key
new file mode 100644
index 0000000..fc761bd
--- /dev/null
+++ b/microservices/httpsservercert/test.example.key
@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----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+-----END PRIVATE KEY-----
diff --git a/microservices/jsonhandling/main.go b/microservices/jsonhandling/main.go
new file mode 100644
index 0000000..4dfb188
--- /dev/null
+++ b/microservices/jsonhandling/main.go
@@ -0,0 +1,23 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+)
+
+type Customer struct {
+	ID        int    `json:"id,omitempty"`
+	Firstname string `json:"first,omitempty"`
+	Lastname  string `json:"last,omitempty"`
+}
+
+func main() {
+	customer := &Customer{ID: 1,
+		Firstname: "Hans", Lastname: "Wurst"}
+	bites, _ := json.Marshal(customer)
+	fmt.Println(string(bites))
+
+	customer2 := &Customer{}
+	json.Unmarshal(bites, customer2)
+	fmt.Println(customer2.Firstname)
+}
diff --git a/microservices/jsonservice/GET-request.http b/microservices/jsonservice/GET-request.http
new file mode 100644
index 0000000..6637830
--- /dev/null
+++ b/microservices/jsonservice/GET-request.http
@@ -0,0 +1 @@
+GET http://localhost:8080/customer HTTP/1.1
\ No newline at end of file
diff --git a/microservices/jsonservice/POST-request.http b/microservices/jsonservice/POST-request.http
new file mode 100644
index 0000000..eb1898d
--- /dev/null
+++ b/microservices/jsonservice/POST-request.http
@@ -0,0 +1,8 @@
+POST http://localhost:8080/customer HTTP/1.1
+content-type: application/json
+
+{
+    "ID": 2,
+    "Lastname": "Wurst"
+}
+
diff --git a/microservices/jsonservice/go.mod b/microservices/jsonservice/go.mod
new file mode 100644
index 0000000..38b7222
--- /dev/null
+++ b/microservices/jsonservice/go.mod
@@ -0,0 +1,5 @@
+module golang.source-fellows.com/samples/jsonservice
+
+go 1.13
+
+require github.com/gorilla/mux v1.7.4
diff --git a/microservices/jsonservice/go.sum b/microservices/jsonservice/go.sum
new file mode 100644
index 0000000..abb0613
--- /dev/null
+++ b/microservices/jsonservice/go.sum
@@ -0,0 +1,2 @@
+github.com/gorilla/mux v1.7.4 h1:VuZ8uybHlWmqV03+zRzdwKL4tUnIp1MAQtp1mIFE1bc=
+github.com/gorilla/mux v1.7.4/go.mod h1:DVbg23sWSpFRCP0SfiEN6jmj59UnW/n46BH5rLB71So=
diff --git a/microservices/jsonservice/main.go b/microservices/jsonservice/main.go
new file mode 100644
index 0000000..c8ce7dd
--- /dev/null
+++ b/microservices/jsonservice/main.go
@@ -0,0 +1,37 @@
+package main
+
+import (
+	"encoding/json"
+	"io/ioutil"
+	"net/http"
+
+	"github.com/gorilla/mux"
+)
+
+type Customer struct {
+	ID        int    `json:"id,omitempty"`
+	Firstname string `json:"first,omitempty"`
+	Lastname  string `json:"last,omitempty"`
+}
+
+var customer *Customer
+
+func myGetFunc(rw http.ResponseWriter, rq *http.Request) {
+	bites, _ := json.Marshal(customer)
+	rw.Header().Add("Content-Type", "application/json")
+	rw.Write(bites)
+}
+
+func myPostFunc(rw http.ResponseWriter, rq *http.Request) {
+	body, _ := ioutil.ReadAll(rq.Body)
+	json.Unmarshal(body, customer)
+	rw.WriteHeader(204)
+}
+
+func main() {
+	customer = &Customer{ID: 1, Firstname: "Peter"}
+	r := mux.NewRouter()
+	r.HandleFunc("/customer", myGetFunc).Methods("GET")
+	r.HandleFunc("/customer", myPostFunc).Methods("POST")
+	http.ListenAndServe(":8080", r)
+}
diff --git a/microservices/jwt/server/go.mod b/microservices/jwt/server/go.mod
new file mode 100644
index 0000000..82ad881
--- /dev/null
+++ b/microservices/jwt/server/go.mod
@@ -0,0 +1,5 @@
+module golang.source-fellows.com/samples/jwt/server
+
+go 1.14
+
+require github.com/SermoDigital/jose v0.9.2-0.20161205224733-f6df55f235c2
diff --git a/microservices/jwt/server/go.sum b/microservices/jwt/server/go.sum
new file mode 100644
index 0000000..68f3afd
--- /dev/null
+++ b/microservices/jwt/server/go.sum
@@ -0,0 +1,2 @@
+github.com/SermoDigital/jose v0.9.2-0.20161205224733-f6df55f235c2 h1:koK7z0nSsRiRiBWwa+E714Puh+DO+ZRdIyAXiXzL+lg=
+github.com/SermoDigital/jose v0.9.2-0.20161205224733-f6df55f235c2/go.mod h1:ARgCUhI1MHQH+ONky/PAtmVHQrP5JlGY0F3poXOp/fA=
diff --git a/microservices/jwt/server/jwt/token.go b/microservices/jwt/server/jwt/token.go
new file mode 100644
index 0000000..c897337
--- /dev/null
+++ b/microservices/jwt/server/jwt/token.go
@@ -0,0 +1,27 @@
+package jwt
+
+import (
+	"time"
+
+	"github.com/SermoDigital/jose/crypto"
+	"github.com/SermoDigital/jose/jws"
+)
+
+var key = []byte("meinGeheimerSchlüssel")
+
+func CreateToken(user string) ([]byte, error) {
+	claims := jws.Claims{}
+	claims.SetAudience("source-fellows.com")
+	claims.SetIssuer(user)
+	claims.SetExpiration(time.Now().Add(time.Minute * 10))
+	token := jws.NewJWT(claims, crypto.SigningMethodHS256)
+	return token.Serialize(key)
+}
+
+func ValidateToken(token []byte) error {
+	newToken, err := jws.ParseJWT(token)
+	if err != nil {
+		return err
+	}
+	return newToken.Validate(key, crypto.SigningMethodHS256)
+}
diff --git a/microservices/jwt/server/main.go b/microservices/jwt/server/main.go
new file mode 100644
index 0000000..95328d9
--- /dev/null
+++ b/microservices/jwt/server/main.go
@@ -0,0 +1,31 @@
+package main
+
+import (
+	"log"
+	"net/http"
+
+	"golang.source-fellows.com/samples/jwt/server/jwt"
+)
+
+func handle(res http.ResponseWriter, req *http.Request) {
+	token, err := jwt.CreateToken()
+	if err != nil {
+		log.Fatal(err)
+		res.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	err = jwt.ValidateToken(token)
+	if err != nil {
+		log.Fatal(err)
+		res.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	res.Write(token)
+}
+
+func main() {
+	http.HandleFunc("/", handle)
+	http.ListenAndServe(":8080", nil)
+}
diff --git a/microservices/letscrypt/go.mod b/microservices/letscrypt/go.mod
new file mode 100644
index 0000000..0582dba
--- /dev/null
+++ b/microservices/letscrypt/go.mod
@@ -0,0 +1,3 @@
+module golang.source-fellows.com/samples/https/letscrypt
+
+go 1.14
diff --git a/microservices/letscrypt/main.go b/microservices/letscrypt/main.go
new file mode 100644
index 0000000..523c4a2
--- /dev/null
+++ b/microservices/letscrypt/main.go
@@ -0,0 +1,19 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+
+	"golang.org/x/crypto/acme/autocert"
+)
+
+func main() {
+
+	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		fmt.Fprintln(w, "Hello World")
+	})
+
+	log.Fatal(http.Serve(autocert.NewListener("x.source-fellows.com"), nil))
+
+}
diff --git a/microservices/logging/go.mod b/microservices/logging/go.mod
new file mode 100644
index 0000000..3eaeb22
--- /dev/null
+++ b/microservices/logging/go.mod
@@ -0,0 +1,5 @@
+module golang.source-fellows.com/samples/logging
+
+go 1.13
+
+require github.com/sirupsen/logrus v1.6.0
diff --git a/microservices/logging/go.sum b/microservices/logging/go.sum
new file mode 100644
index 0000000..f42da32
--- /dev/null
+++ b/microservices/logging/go.sum
@@ -0,0 +1,12 @@
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/konsorten/go-windows-terminal-sequences v1.0.3 h1:CE8S1cTafDpPvMhIxNJKvHsGVBgn1xWYf1NbHQhywc8=
+github.com/konsorten/go-windows-terminal-sequences v1.0.3/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/sirupsen/logrus v1.6.0 h1:UBcNElsrwanuuMsnGSlYmtmgbb23qDR5dG+6X6Oo89I=
+github.com/sirupsen/logrus v1.6.0/go.mod h1:7uNnSEd1DgxDLC74fIahvMZmmYsHGZGEOFrfsX/uA88=
+github.com/stretchr/testify v1.2.2 h1:bSDNvY7ZPG5RlJ8otE/7V6gMiyenm9RtJ7IUVIAoJ1w=
+github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
+golang.org/x/sys v0.0.0-20190422165155-953cdadca894 h1:Cz4ceDQGXuKRnVBDTS23GTn/pU5OE2C0WrNTOYK1Uuc=
+golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
diff --git a/microservices/logging/main.go b/microservices/logging/main.go
new file mode 100644
index 0000000..80e13b2
--- /dev/null
+++ b/microservices/logging/main.go
@@ -0,0 +1,21 @@
+package main
+
+import (
+	log "github.com/sirupsen/logrus"
+)
+
+func main() {
+	// zusätzliche Felder an log.Entry anhängen
+	log.WithFields(log.Fields{
+		"importId": "ka18s",
+		"size":     10,
+	}).Info("Starte den Import")
+	// Wiederverwenden von log.Entry damit alle weiteren
+	// Aufrufe ebenfalls Felder bekommen
+	contextLogger := log.WithFields(log.Fields{
+		"importId": "0815s",
+		"other":    "Ich werde geloggt",
+	})
+	contextLogger.Info("I'll be logged with common and other field")
+	contextLogger.Info("Me too")
+}
diff --git a/microservices/middleware/go.mod b/microservices/middleware/go.mod
new file mode 100644
index 0000000..92feb93
--- /dev/null
+++ b/microservices/middleware/go.mod
@@ -0,0 +1,3 @@
+module golang.source-fellows.com/samples/middleware
+
+go 1.14
diff --git a/microservices/middleware/main.go b/microservices/middleware/main.go
new file mode 100644
index 0000000..64a32d1
--- /dev/null
+++ b/microservices/middleware/main.go
@@ -0,0 +1,28 @@
+package main
+
+import (
+	"log"
+	"net/http"
+)
+
+func businessLogic(text string) http.Handler {
+	myFunc := func(res http.ResponseWriter, req *http.Request) {
+		res.Write([]byte(text))
+	}
+	return http.HandlerFunc(myFunc)
+}
+
+func middleWare(wrapped http.Handler) http.Handler {
+	return http.HandlerFunc(func(re http.ResponseWriter, rq *http.Request) {
+		log.Println("before request")
+		wrapped.ServeHTTP(re, rq)
+		log.Println("after request")
+	})
+}
+
+func main() {
+	http.Handle("/", middleWare(businessLogic("Hello World")))
+	if err := http.ListenAndServe(":8080", nil); err != nil {
+		log.Printf("error with server %v", err)
+	}
+}
diff --git a/microservices/mongodb-update/docker-compose.yml b/microservices/mongodb-update/docker-compose.yml
new file mode 100644
index 0000000..ff8210a
--- /dev/null
+++ b/microservices/mongodb-update/docker-compose.yml
@@ -0,0 +1,19 @@
+version: '3'
+services:
+  mongodb:
+    image: 'mongo'
+    container_name: 'mongo-container'
+    environment:
+     - MONGO_INITDB_DATABASE=mongodb
+     - MONGO_INITDB_ROOT_USERNAME=mongorootuser
+     - MONGO_INITDB_ROOT_PASSWORD=mongorootpw
+    ports:
+     - '27017-27019:27017-27019'
+  mongo-express:
+    image: mongo-express
+    environment:
+      - ME_CONFIG_MONGODB_SERVER=mongodb
+      - ME_CONFIG_MONGODB_ADMINUSERNAME=mongorootuser
+      - ME_CONFIG_MONGODB_ADMINPASSWORD=mongorootpw
+    ports:
+      - 8081:8081
\ No newline at end of file
diff --git a/microservices/mongodb-update/go.mod b/microservices/mongodb-update/go.mod
new file mode 100644
index 0000000..60fe878
--- /dev/null
+++ b/microservices/mongodb-update/go.mod
@@ -0,0 +1,5 @@
+module golang.source-fellows.com/samples/mongodb
+
+go 1.14
+
+require go.mongodb.org/mongo-driver v1.3.5 // indirect
diff --git a/microservices/mongodb-update/go.sum b/microservices/mongodb-update/go.sum
new file mode 100644
index 0000000..9c69671
--- /dev/null
+++ b/microservices/mongodb-update/go.sum
@@ -0,0 +1,100 @@
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diff --git a/microservices/mongodb-update/main.go b/microservices/mongodb-update/main.go
new file mode 100644
index 0000000..519a5be
--- /dev/null
+++ b/microservices/mongodb-update/main.go
@@ -0,0 +1,84 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"go.mongodb.org/mongo-driver/bson"
+	"go.mongodb.org/mongo-driver/mongo"
+	"go.mongodb.org/mongo-driver/mongo/options"
+	"go.mongodb.org/mongo-driver/mongo/readpref"
+)
+
+type Customer struct {
+	FirstName  string
+	LastName   string
+	CreditCard CreditCard
+}
+
+type CreditCard struct {
+	Number string
+}
+
+func main() {
+	client, err := mongo.NewClient(
+		options.Client().
+			ApplyURI("mongodb://mongorootuser:mongorootpw@localhost:27017"))
+	if err != nil {
+		panic(err)
+	}
+	ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
+	defer cancel()
+	err = client.Connect(ctx)
+	if err != nil {
+		panic(err)
+	}
+	defer func() {
+		if err = client.Disconnect(ctx); err != nil {
+			panic(err)
+		}
+	}()
+	err = client.Ping(ctx, readpref.Primary())
+	if err != nil {
+		panic(err)
+	}
+
+	collection := client.Database("shop").Collection("customer")
+	customer := Customer{FirstName: "Hans", LastName: "wurst"}
+	customer.CreditCard = CreditCard{Number: "123-123-123"}
+	collection.InsertOne(ctx, customer)
+
+	cursor, err := collection.Find(ctx, bson.D{{"firstname", "Hans"}})
+	if err != nil {
+		panic(err)
+	}
+	defer cursor.Close(ctx)
+
+	for cursor.Next(ctx) {
+		var result bson.M
+		err := cursor.Decode(&result)
+		if err != nil {
+			panic(err)
+		}
+		fmt.Printf("result is %v\n", result)
+	}
+	if err := cursor.Err(); err != nil {
+		panic(err)
+	}
+
+	filter := bson.D{{"firstname", "Hans"}}
+	updated := bson.M{
+		"$set": Customer{FirstName: "Peter", LastName: "Lustig"},
+	}
+
+	res, err := collection.UpdateOne(ctx, filter, updated)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println(res.MatchedCount)
+
+	collection.FindOneAndUpdate(ctx, filter, updated)
+	collection.FindOneAndDelete(ctx, filter)
+
+}
diff --git a/microservices/mongodb/docker-compose.yml b/microservices/mongodb/docker-compose.yml
new file mode 100644
index 0000000..ff8210a
--- /dev/null
+++ b/microservices/mongodb/docker-compose.yml
@@ -0,0 +1,19 @@
+version: '3'
+services:
+  mongodb:
+    image: 'mongo'
+    container_name: 'mongo-container'
+    environment:
+     - MONGO_INITDB_DATABASE=mongodb
+     - MONGO_INITDB_ROOT_USERNAME=mongorootuser
+     - MONGO_INITDB_ROOT_PASSWORD=mongorootpw
+    ports:
+     - '27017-27019:27017-27019'
+  mongo-express:
+    image: mongo-express
+    environment:
+      - ME_CONFIG_MONGODB_SERVER=mongodb
+      - ME_CONFIG_MONGODB_ADMINUSERNAME=mongorootuser
+      - ME_CONFIG_MONGODB_ADMINPASSWORD=mongorootpw
+    ports:
+      - 8081:8081
\ No newline at end of file
diff --git a/microservices/mongodb/go.mod b/microservices/mongodb/go.mod
new file mode 100644
index 0000000..60fe878
--- /dev/null
+++ b/microservices/mongodb/go.mod
@@ -0,0 +1,5 @@
+module golang.source-fellows.com/samples/mongodb
+
+go 1.14
+
+require go.mongodb.org/mongo-driver v1.3.5 // indirect
diff --git a/microservices/mongodb/go.sum b/microservices/mongodb/go.sum
new file mode 100644
index 0000000..9c69671
--- /dev/null
+++ b/microservices/mongodb/go.sum
@@ -0,0 +1,100 @@
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+github.com/xdg/scram v0.0.0-20180814205039-7eeb5667e42c h1:u40Z8hqBAAQyv+vATcGgV0YCnDjqSL7/q/JyPhhJSPk=
+github.com/xdg/scram v0.0.0-20180814205039-7eeb5667e42c/go.mod h1:lB8K/P019DLNhemzwFU4jHLhdvlE6uDZjXFejJXr49I=
+github.com/xdg/stringprep v0.0.0-20180714160509-73f8eece6fdc h1:n+nNi93yXLkJvKwXNP9d55HC7lGK4H/SRcwB5IaUZLo=
+github.com/xdg/stringprep v0.0.0-20180714160509-73f8eece6fdc/go.mod h1:Jhud4/sHMO4oL310DaZAKk9ZaJ08SJfe+sJh0HrGL1Y=
+go.mongodb.org/mongo-driver v1.3.5 h1:S0ZOruh4YGHjD7JoN7mIsTrNjnQbOjrmgrx6l6pZN7I=
+go.mongodb.org/mongo-driver v1.3.5/go.mod h1:Ual6Gkco7ZGQw8wE1t4tLnvBsf6yVSM60qW6TgOeJ5c=
+golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20190422162423-af44ce270edf/go.mod h1:WFFai1msRO1wXaEeE5yQxYXgSfI8pQAWXbQop6sCtWE=
+golang.org/x/crypto v0.0.0-20190530122614-20be4c3c3ed5 h1:8dUaAV7K4uHsF56JQWkprecIQKdPHtR9jCHF5nB8uzc=
+golang.org/x/crypto v0.0.0-20190530122614-20be4c3c3ed5/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
+golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20190412183630-56d357773e84/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20190423024810-112230192c58 h1:8gQV6CLnAEikrhgkHFbMAEhagSSnXWGV915qUMm9mrU=
+golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190403152447-81d4e9dc473e/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190419153524-e8e3143a4f4a/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190531175056-4c3a928424d2/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/text v0.3.3 h1:cokOdA+Jmi5PJGXLlLllQSgYigAEfHXJAERHVMaCc2k=
+golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20190329151228-23e29df326fe/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
+golang.org/x/tools v0.0.0-20190416151739-9c9e1878f421/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
+golang.org/x/tools v0.0.0-20190420181800-aa740d480789/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
+golang.org/x/tools v0.0.0-20190531172133-b3315ee88b7d/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
diff --git a/microservices/mongodb/main.go b/microservices/mongodb/main.go
new file mode 100644
index 0000000..759884d
--- /dev/null
+++ b/microservices/mongodb/main.go
@@ -0,0 +1,70 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"go.mongodb.org/mongo-driver/bson"
+	"go.mongodb.org/mongo-driver/mongo"
+	"go.mongodb.org/mongo-driver/mongo/options"
+	"go.mongodb.org/mongo-driver/mongo/readpref"
+)
+
+type Customer struct {
+	FirstName  string
+	LastName   string
+	CreditCard CreditCard
+}
+
+type CreditCard struct {
+	Number string
+}
+
+func main() {
+	client, err := mongo.NewClient(
+		options.Client().
+			ApplyURI("mongodb://mongorootuser:mongorootpw@localhost:27017"))
+	if err != nil {
+		panic(err)
+	}
+	ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
+	defer cancel()
+	err = client.Connect(ctx)
+	if err != nil {
+		panic(err)
+	}
+	defer func() {
+		if err = client.Disconnect(ctx); err != nil {
+			panic(err)
+		}
+	}()
+	err = client.Ping(ctx, readpref.Primary())
+	if err != nil {
+		panic(err)
+	}
+
+	collection := client.Database("shop").Collection("customer")
+	customer := Customer{FirstName: "Hans", LastName: "wurst"}
+	customer.CreditCard = CreditCard{Number: "123-123-123"}
+	collection.InsertOne(ctx, customer)
+
+	cursor, err := collection.Find(ctx, bson.D{{"firstname", "Hans"}})
+	if err != nil {
+		panic(err)
+	}
+	defer cursor.Close(ctx)
+
+	for cursor.Next(ctx) {
+		var result bson.M
+		err := cursor.Decode(&result)
+		if err != nil {
+			panic(err)
+		}
+		fmt.Printf("result is %v\n", result)
+	}
+	if err := cursor.Err(); err != nil {
+		panic(err)
+	}
+
+}
diff --git a/microservices/nats/receiver/cmd/main.go b/microservices/nats/receiver/cmd/main.go
new file mode 100644
index 0000000..1b92371
--- /dev/null
+++ b/microservices/nats/receiver/cmd/main.go
@@ -0,0 +1,29 @@
+package main
+
+import (
+	"log"
+	"time"
+
+	"github.com/nats-io/nats.go"
+)
+
+func main() {
+	nc, err := nats.Connect(nats.DefaultURL)
+	if err != nil {
+		log.Fatalf("Could not connect to server because of %v", err)
+	}
+	defer nc.Close()
+	sub, err := nc.SubscribeSync("foo")
+	if err != nil {
+		log.Fatalf("Could not subscribe because of %v", err)
+	}
+	m, err := sub.NextMsg(20 * time.Second)
+	if m == nil {
+		log.Println("No messages available")
+		return
+	}
+	log.Println(m.Subject)
+	log.Println(string(m.Data))
+	sub.Unsubscribe()
+	sub.Drain()
+}
diff --git a/microservices/nats/receiver/go.mod b/microservices/nats/receiver/go.mod
new file mode 100644
index 0000000..8a26e90
--- /dev/null
+++ b/microservices/nats/receiver/go.mod
@@ -0,0 +1,5 @@
+module golang.source-fellows.com/nats/receiver
+
+go 1.14
+
+require github.com/nats-io/nats.go v1.10.0
diff --git a/microservices/nats/receiver/go.sum b/microservices/nats/receiver/go.sum
new file mode 100644
index 0000000..3dd11f0
--- /dev/null
+++ b/microservices/nats/receiver/go.sum
@@ -0,0 +1,17 @@
+github.com/nats-io/jwt v0.3.2 h1:+RB5hMpXUUA2dfxuhBTEkMOrYmM+gKIZYS1KjSostMI=
+github.com/nats-io/jwt v0.3.2/go.mod h1:/euKqTS1ZD+zzjYrY7pseZrTtWQSjujC7xjPc8wL6eU=
+github.com/nats-io/nats.go v1.10.0 h1:L8qnKaofSfNFbXg0C5F71LdjPRnmQwSsA4ukmkt1TvY=
+github.com/nats-io/nats.go v1.10.0/go.mod h1:AjGArbfyR50+afOUotNX2Xs5SYHf+CoOa5HH1eEl2HE=
+github.com/nats-io/nkeys v0.1.3/go.mod h1:xpnFELMwJABBLVhffcfd1MZx6VsNRFpEugbxziKVo7w=
+github.com/nats-io/nkeys v0.1.4 h1:aEsHIssIk6ETN5m2/MD8Y4B2X7FfXrBAUdkyRvbVYzA=
+github.com/nats-io/nkeys v0.1.4/go.mod h1:XdZpAbhgyyODYqjTawOnIOI7VlbKSarI9Gfy1tqEu/s=
+github.com/nats-io/nuid v1.0.1 h1:5iA8DT8V7q8WK2EScv2padNa/rTESc1KdnPw4TC2paw=
+github.com/nats-io/nuid v1.0.1/go.mod h1:19wcPz3Ph3q0Jbyiqsd0kePYG7A95tJPxeL+1OSON2c=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
+golang.org/x/crypto v0.0.0-20200323165209-0ec3e9974c59 h1:3zb4D3T4G8jdExgVU/95+vQXfpEPiMdCaZgmGVxjNHM=
+golang.org/x/crypto v0.0.0-20200323165209-0ec3e9974c59/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
+golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
diff --git a/microservices/nats/sender/cmd/main.go b/microservices/nats/sender/cmd/main.go
new file mode 100644
index 0000000..8a1571e
--- /dev/null
+++ b/microservices/nats/sender/cmd/main.go
@@ -0,0 +1,19 @@
+package main
+
+import (
+	"log"
+
+	"github.com/nats-io/nats.go"
+)
+
+func main() {
+	nc, err := nats.Connect(nats.DefaultURL)
+
+	if err != nil {
+		log.Fatalf("Could not connect to server because of %v", err)
+	}
+	defer nc.Close()
+
+	nc.Publish("foo", []byte("Hello World"))
+
+}
diff --git a/microservices/nats/sender/go.mod b/microservices/nats/sender/go.mod
new file mode 100644
index 0000000..51e7319
--- /dev/null
+++ b/microservices/nats/sender/go.mod
@@ -0,0 +1,5 @@
+module golang.source-fellows.com/nats/sender
+
+go 1.14
+
+require github.com/nats-io/nats.go v1.10.0 // indirect
diff --git a/microservices/nats/sender/go.sum b/microservices/nats/sender/go.sum
new file mode 100644
index 0000000..3dd11f0
--- /dev/null
+++ b/microservices/nats/sender/go.sum
@@ -0,0 +1,17 @@
+github.com/nats-io/jwt v0.3.2 h1:+RB5hMpXUUA2dfxuhBTEkMOrYmM+gKIZYS1KjSostMI=
+github.com/nats-io/jwt v0.3.2/go.mod h1:/euKqTS1ZD+zzjYrY7pseZrTtWQSjujC7xjPc8wL6eU=
+github.com/nats-io/nats.go v1.10.0 h1:L8qnKaofSfNFbXg0C5F71LdjPRnmQwSsA4ukmkt1TvY=
+github.com/nats-io/nats.go v1.10.0/go.mod h1:AjGArbfyR50+afOUotNX2Xs5SYHf+CoOa5HH1eEl2HE=
+github.com/nats-io/nkeys v0.1.3/go.mod h1:xpnFELMwJABBLVhffcfd1MZx6VsNRFpEugbxziKVo7w=
+github.com/nats-io/nkeys v0.1.4 h1:aEsHIssIk6ETN5m2/MD8Y4B2X7FfXrBAUdkyRvbVYzA=
+github.com/nats-io/nkeys v0.1.4/go.mod h1:XdZpAbhgyyODYqjTawOnIOI7VlbKSarI9Gfy1tqEu/s=
+github.com/nats-io/nuid v1.0.1 h1:5iA8DT8V7q8WK2EScv2padNa/rTESc1KdnPw4TC2paw=
+github.com/nats-io/nuid v1.0.1/go.mod h1:19wcPz3Ph3q0Jbyiqsd0kePYG7A95tJPxeL+1OSON2c=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
+golang.org/x/crypto v0.0.0-20200323165209-0ec3e9974c59 h1:3zb4D3T4G8jdExgVU/95+vQXfpEPiMdCaZgmGVxjNHM=
+golang.org/x/crypto v0.0.0-20200323165209-0ec3e9974c59/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
+golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
diff --git a/microservices/oracle-db-connection-prepared-statement/.devcontainer/Dockerfile b/microservices/oracle-db-connection-prepared-statement/.devcontainer/Dockerfile
new file mode 100644
index 0000000..4190530
--- /dev/null
+++ b/microservices/oracle-db-connection-prepared-statement/.devcontainer/Dockerfile
@@ -0,0 +1,90 @@
+#-------------------------------------------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See https://go.microsoft.com/fwlink/?linkid=2090316 for license information.
+#-------------------------------------------------------------------------------------------------------------
+
+FROM golang:1
+
+# This Dockerfile adds a non-root user with sudo access. Use the "remoteUser"
+# property in devcontainer.json to use it. On Linux, the container user's GID/UIDs
+# will be updated to match your local UID/GID (when using the dockerFile property).
+# See https://aka.ms/vscode-remote/containers/non-root-user for details.
+ARG USERNAME=vscode
+ARG USER_UID=1000
+ARG USER_GID=$USER_UID
+
+# Configure apt, install packages and tools
+RUN apt-get update \
+    && export DEBIAN_FRONTEND=noninteractive \
+    && apt-get -y install --no-install-recommends apt-utils dialog 2>&1 \
+    #
+    # Verify git, process tools, lsb-release (common in install instructions for CLIs) installed
+    && apt-get -y install git openssh-client less iproute2 procps lsb-release \
+    #
+    # Build Go tools w/module support
+    && mkdir -p /tmp/gotools \
+    && cd /tmp/gotools \
+    && GOPATH=/tmp/gotools GO111MODULE=on go get -v golang.org/x/tools/gopls@latest 2>&1 \
+    && GOPATH=/tmp/gotools GO111MODULE=on go get -v \
+        honnef.co/go/tools/...@latest \
+        golang.org/x/tools/cmd/gorename@latest \
+        golang.org/x/tools/cmd/goimports@latest \
+        golang.org/x/tools/cmd/guru@latest \
+        golang.org/x/lint/golint@latest \
+        github.com/mdempsky/gocode@latest \
+        github.com/cweill/gotests/...@latest \
+        github.com/haya14busa/goplay/cmd/goplay@latest \
+        github.com/sqs/goreturns@latest \
+        github.com/josharian/impl@latest \
+        github.com/davidrjenni/reftools/cmd/fillstruct@latest \
+        github.com/uudashr/gopkgs/v2/cmd/gopkgs@latest  \
+        github.com/ramya-rao-a/go-outline@latest  \
+        github.com/acroca/go-symbols@latest  \
+        github.com/godoctor/godoctor@latest  \
+        github.com/rogpeppe/godef@latest  \
+        github.com/zmb3/gogetdoc@latest \
+        github.com/fatih/gomodifytags@latest  \
+        github.com/mgechev/revive@latest  \
+        github.com/go-delve/delve/cmd/dlv@latest 2>&1 \
+    #
+    # Build Go tools w/o module support
+    && GOPATH=/tmp/gotools go get -v github.com/alecthomas/gometalinter 2>&1 \
+    #
+    # Build gocode-gomod
+    && GOPATH=/tmp/gotools go get -x -d github.com/stamblerre/gocode 2>&1 \
+    && GOPATH=/tmp/gotools go build -o gocode-gomod github.com/stamblerre/gocode \
+    #
+    # Install Go tools
+    && mv /tmp/gotools/bin/* /usr/local/bin/ \
+    && mv gocode-gomod /usr/local/bin/ \
+    #
+    # Install golangci-lint
+    && curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b /usr/local/bin 2>&1 \
+    #
+    # Create a non-root user to use if preferred - see https://aka.ms/vscode-remote/containers/non-root-user.
+    && groupadd --gid $USER_GID $USERNAME \
+    && useradd -s /bin/bash --uid $USER_UID --gid $USER_GID -m $USERNAME \
+    # [Optional] Add sudo support
+    && apt-get install -y sudo \
+    && echo $USERNAME ALL=\(root\) NOPASSWD:ALL > /etc/sudoers.d/$USERNAME \
+    && chmod 0440 /etc/sudoers.d/$USERNAME \
+    #
+    # Clean up
+    && apt-get autoremove -y \
+    && apt-get clean -y \
+    && rm -rf /var/lib/apt/lists/* /tmp/gotools
+
+# Update this to "on" or "off" as appropriate
+ENV GO111MODULE=auto
+
+#Install Oracle Client
+RUN apt-get update &&\
+    apt-get -y install unzip libaio1 && \
+    mkdir /opt/oracle &&\
+    curl -o /opt/oracle/oracle.zip https://download.oracle.com/otn_software/linux/instantclient/19600/instantclient-basiclite-linux.x64-19.6.0.0.0dbru.zip &&\
+    cd /opt/oracle &&\
+    unzip oracle.zip &&\
+    rm oracle.zip
+
+ENV LD_LIBRARY_PATH=/opt/oracle/instantclient_19_6:$LD_LIBRARY_PATH
+
diff --git a/microservices/oracle-db-connection-prepared-statement/.devcontainer/devcontainer.json b/microservices/oracle-db-connection-prepared-statement/.devcontainer/devcontainer.json
new file mode 100644
index 0000000..faba3ff
--- /dev/null
+++ b/microservices/oracle-db-connection-prepared-statement/.devcontainer/devcontainer.json
@@ -0,0 +1,27 @@
+// For format details, see https://aka.ms/vscode-remote/devcontainer.json or this file's README at:
+// https://github.com/microsoft/vscode-dev-containers/tree/v0.122.1/containers/go
+{
+	"name": "Go",
+	"dockerFile": "Dockerfile",
+	"runArgs": [ "--cap-add=SYS_PTRACE", "--security-opt", "seccomp=unconfined" ],
+
+	// Set *default* container specific settings.json values on container create.
+	"settings": {
+		"terminal.integrated.shell.linux": "/bin/bash",
+		"go.gopath": "/go"
+	},
+
+	// Add the IDs of extensions you want installed when the container is created.
+	"extensions": [
+		"golang.Go"
+	]
+
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	// "forwardPorts": [],
+
+	// Use 'postCreateCommand' to run commands after the container is created.
+	,"postCreateCommand": "go get",
+
+	// Uncomment to connect as a non-root user. See https://aka.ms/vscode-remote/containers/non-root.
+	// "remoteUser": "vscode"
+}
\ No newline at end of file
diff --git a/microservices/oracle-db-connection-prepared-statement/go.mod b/microservices/oracle-db-connection-prepared-statement/go.mod
new file mode 100644
index 0000000..aa16802
--- /dev/null
+++ b/microservices/oracle-db-connection-prepared-statement/go.mod
@@ -0,0 +1,5 @@
+module golang.source-fellows.com/samples/oracle
+
+go 1.14
+
+require github.com/godror/godror v0.17.0
diff --git a/microservices/oracle-db-connection-prepared-statement/go.sum b/microservices/oracle-db-connection-prepared-statement/go.sum
new file mode 100644
index 0000000..b224ccc
--- /dev/null
+++ b/microservices/oracle-db-connection-prepared-statement/go.sum
@@ -0,0 +1,7 @@
+github.com/go-logfmt/logfmt v0.5.0/go.mod h1:wCYkCAKZfumFQihp8CzCvQ3paCTfi41vtzG1KdI/P7A=
+github.com/godror/godror v0.17.0 h1:ClVuKG0qCj6f182BruhwgHS8xCgfpQp35pTrefSq4NE=
+github.com/godror/godror v0.17.0/go.mod h1:DE94Br7LXn4dQGCexePriVrKotR9GkVzPPT5nnm8dj0=
+github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
diff --git a/microservices/oracle-db-connection-prepared-statement/main.go b/microservices/oracle-db-connection-prepared-statement/main.go
new file mode 100644
index 0000000..03f2966
--- /dev/null
+++ b/microservices/oracle-db-connection-prepared-statement/main.go
@@ -0,0 +1,50 @@
+package main
+
+import (
+	"database/sql"
+	"log"
+	"time"
+
+	_ "github.com/godror/godror"
+)
+
+type Angestellter struct {
+	id                int
+	Name              string
+	Einstellungsdatum time.Time
+}
+
+func main() {
+	db, err := sql.Open("godror", "app/app@(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=tcp)(HOST=172.17.0.1)(PORT=1521)))(CONNECT_DATA=(SID=ORCLCDB)))")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer db.Close()
+	db.SetMaxIdleConns(0)
+	db.SetMaxOpenConns(100)
+	db.SetConnMaxLifetime(2 * time.Hour)
+
+	stmt, err := db.Prepare("select EMPNO, ENAME, HIREDATE from EMP where EMPNO = :p")
+	if err != nil {
+		log.Fatalf("Fehler bei Query: %v", err)
+	}
+	defer stmt.Close()
+	rows, err := stmt.Query(sql.Named("p", 7499))
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer rows.Close()
+
+	log.Println("retri")
+
+	for rows.Next() {
+		angestellter := &Angestellter{}
+		err = rows.Scan(&angestellter.id,
+			&angestellter.Name,
+			&angestellter.Einstellungsdatum)
+		if err != nil {
+			log.Fatalf("Fehler beim Laden: %v", err)
+		}
+		log.Println(angestellter)
+	}
+}
diff --git a/microservices/oracle-db-connection-write-tx/.devcontainer/Dockerfile b/microservices/oracle-db-connection-write-tx/.devcontainer/Dockerfile
new file mode 100644
index 0000000..4190530
--- /dev/null
+++ b/microservices/oracle-db-connection-write-tx/.devcontainer/Dockerfile
@@ -0,0 +1,90 @@
+#-------------------------------------------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See https://go.microsoft.com/fwlink/?linkid=2090316 for license information.
+#-------------------------------------------------------------------------------------------------------------
+
+FROM golang:1
+
+# This Dockerfile adds a non-root user with sudo access. Use the "remoteUser"
+# property in devcontainer.json to use it. On Linux, the container user's GID/UIDs
+# will be updated to match your local UID/GID (when using the dockerFile property).
+# See https://aka.ms/vscode-remote/containers/non-root-user for details.
+ARG USERNAME=vscode
+ARG USER_UID=1000
+ARG USER_GID=$USER_UID
+
+# Configure apt, install packages and tools
+RUN apt-get update \
+    && export DEBIAN_FRONTEND=noninteractive \
+    && apt-get -y install --no-install-recommends apt-utils dialog 2>&1 \
+    #
+    # Verify git, process tools, lsb-release (common in install instructions for CLIs) installed
+    && apt-get -y install git openssh-client less iproute2 procps lsb-release \
+    #
+    # Build Go tools w/module support
+    && mkdir -p /tmp/gotools \
+    && cd /tmp/gotools \
+    && GOPATH=/tmp/gotools GO111MODULE=on go get -v golang.org/x/tools/gopls@latest 2>&1 \
+    && GOPATH=/tmp/gotools GO111MODULE=on go get -v \
+        honnef.co/go/tools/...@latest \
+        golang.org/x/tools/cmd/gorename@latest \
+        golang.org/x/tools/cmd/goimports@latest \
+        golang.org/x/tools/cmd/guru@latest \
+        golang.org/x/lint/golint@latest \
+        github.com/mdempsky/gocode@latest \
+        github.com/cweill/gotests/...@latest \
+        github.com/haya14busa/goplay/cmd/goplay@latest \
+        github.com/sqs/goreturns@latest \
+        github.com/josharian/impl@latest \
+        github.com/davidrjenni/reftools/cmd/fillstruct@latest \
+        github.com/uudashr/gopkgs/v2/cmd/gopkgs@latest  \
+        github.com/ramya-rao-a/go-outline@latest  \
+        github.com/acroca/go-symbols@latest  \
+        github.com/godoctor/godoctor@latest  \
+        github.com/rogpeppe/godef@latest  \
+        github.com/zmb3/gogetdoc@latest \
+        github.com/fatih/gomodifytags@latest  \
+        github.com/mgechev/revive@latest  \
+        github.com/go-delve/delve/cmd/dlv@latest 2>&1 \
+    #
+    # Build Go tools w/o module support
+    && GOPATH=/tmp/gotools go get -v github.com/alecthomas/gometalinter 2>&1 \
+    #
+    # Build gocode-gomod
+    && GOPATH=/tmp/gotools go get -x -d github.com/stamblerre/gocode 2>&1 \
+    && GOPATH=/tmp/gotools go build -o gocode-gomod github.com/stamblerre/gocode \
+    #
+    # Install Go tools
+    && mv /tmp/gotools/bin/* /usr/local/bin/ \
+    && mv gocode-gomod /usr/local/bin/ \
+    #
+    # Install golangci-lint
+    && curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b /usr/local/bin 2>&1 \
+    #
+    # Create a non-root user to use if preferred - see https://aka.ms/vscode-remote/containers/non-root-user.
+    && groupadd --gid $USER_GID $USERNAME \
+    && useradd -s /bin/bash --uid $USER_UID --gid $USER_GID -m $USERNAME \
+    # [Optional] Add sudo support
+    && apt-get install -y sudo \
+    && echo $USERNAME ALL=\(root\) NOPASSWD:ALL > /etc/sudoers.d/$USERNAME \
+    && chmod 0440 /etc/sudoers.d/$USERNAME \
+    #
+    # Clean up
+    && apt-get autoremove -y \
+    && apt-get clean -y \
+    && rm -rf /var/lib/apt/lists/* /tmp/gotools
+
+# Update this to "on" or "off" as appropriate
+ENV GO111MODULE=auto
+
+#Install Oracle Client
+RUN apt-get update &&\
+    apt-get -y install unzip libaio1 && \
+    mkdir /opt/oracle &&\
+    curl -o /opt/oracle/oracle.zip https://download.oracle.com/otn_software/linux/instantclient/19600/instantclient-basiclite-linux.x64-19.6.0.0.0dbru.zip &&\
+    cd /opt/oracle &&\
+    unzip oracle.zip &&\
+    rm oracle.zip
+
+ENV LD_LIBRARY_PATH=/opt/oracle/instantclient_19_6:$LD_LIBRARY_PATH
+
diff --git a/microservices/oracle-db-connection-write-tx/.devcontainer/devcontainer.json b/microservices/oracle-db-connection-write-tx/.devcontainer/devcontainer.json
new file mode 100644
index 0000000..faba3ff
--- /dev/null
+++ b/microservices/oracle-db-connection-write-tx/.devcontainer/devcontainer.json
@@ -0,0 +1,27 @@
+// For format details, see https://aka.ms/vscode-remote/devcontainer.json or this file's README at:
+// https://github.com/microsoft/vscode-dev-containers/tree/v0.122.1/containers/go
+{
+	"name": "Go",
+	"dockerFile": "Dockerfile",
+	"runArgs": [ "--cap-add=SYS_PTRACE", "--security-opt", "seccomp=unconfined" ],
+
+	// Set *default* container specific settings.json values on container create.
+	"settings": {
+		"terminal.integrated.shell.linux": "/bin/bash",
+		"go.gopath": "/go"
+	},
+
+	// Add the IDs of extensions you want installed when the container is created.
+	"extensions": [
+		"golang.Go"
+	]
+
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	// "forwardPorts": [],
+
+	// Use 'postCreateCommand' to run commands after the container is created.
+	,"postCreateCommand": "go get",
+
+	// Uncomment to connect as a non-root user. See https://aka.ms/vscode-remote/containers/non-root.
+	// "remoteUser": "vscode"
+}
\ No newline at end of file
diff --git a/microservices/oracle-db-connection-write-tx/go.mod b/microservices/oracle-db-connection-write-tx/go.mod
new file mode 100644
index 0000000..aa16802
--- /dev/null
+++ b/microservices/oracle-db-connection-write-tx/go.mod
@@ -0,0 +1,5 @@
+module golang.source-fellows.com/samples/oracle
+
+go 1.14
+
+require github.com/godror/godror v0.17.0
diff --git a/microservices/oracle-db-connection-write-tx/go.sum b/microservices/oracle-db-connection-write-tx/go.sum
new file mode 100644
index 0000000..b224ccc
--- /dev/null
+++ b/microservices/oracle-db-connection-write-tx/go.sum
@@ -0,0 +1,7 @@
+github.com/go-logfmt/logfmt v0.5.0/go.mod h1:wCYkCAKZfumFQihp8CzCvQ3paCTfi41vtzG1KdI/P7A=
+github.com/godror/godror v0.17.0 h1:ClVuKG0qCj6f182BruhwgHS8xCgfpQp35pTrefSq4NE=
+github.com/godror/godror v0.17.0/go.mod h1:DE94Br7LXn4dQGCexePriVrKotR9GkVzPPT5nnm8dj0=
+github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
diff --git a/microservices/oracle-db-connection-write-tx/main.go b/microservices/oracle-db-connection-write-tx/main.go
new file mode 100644
index 0000000..86d7b47
--- /dev/null
+++ b/microservices/oracle-db-connection-write-tx/main.go
@@ -0,0 +1,45 @@
+package main
+
+import (
+	"context"
+	"database/sql"
+	"log"
+	"time"
+
+	_ "github.com/godror/godror"
+)
+
+type Angestellter struct {
+	id                int
+	Name              string
+	Einstellungsdatum time.Time
+}
+
+func main() {
+	db, err := sql.Open("godror", "app/app@(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=tcp)(HOST=172.17.0.1)(PORT=1521)))(CONNECT_DATA=(SID=ORCLCDB)))")
+	if err != nil {
+		log.Fatal(err)
+	}
+	db.SetMaxOpenConns(0)
+	db.SetMaxIdleConns(0)
+	defer db.Close()
+
+	tx, err := db.BeginTx(context.Background(), &sql.TxOptions{Isolation: sql.LevelReadCommitted, ReadOnly: true})
+	stmt, err := tx.Prepare("INSERT INTO EMP (EMPNO, ENAME, HIREDATE) VALUES(:id1, :name2, :date3)")
+	if err != nil {
+		log.Fatalf("Fehler bei Statement: %v", err)
+	}
+	for i := 10; i < 100; i++ {
+		_, err = stmt.Exec(
+			sql.Named("id1", i),
+			sql.Named("name2", "JOE"),
+			sql.Named("date3", time.Now()))
+
+		if err != nil {
+			log.Fatalf("Fehler bei Exec: %v", err)
+		}
+	}
+	defer stmt.Close()
+	tx.Commit()
+
+}
diff --git a/microservices/oracle-db-connection-write/.devcontainer/Dockerfile b/microservices/oracle-db-connection-write/.devcontainer/Dockerfile
new file mode 100644
index 0000000..4190530
--- /dev/null
+++ b/microservices/oracle-db-connection-write/.devcontainer/Dockerfile
@@ -0,0 +1,90 @@
+#-------------------------------------------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See https://go.microsoft.com/fwlink/?linkid=2090316 for license information.
+#-------------------------------------------------------------------------------------------------------------
+
+FROM golang:1
+
+# This Dockerfile adds a non-root user with sudo access. Use the "remoteUser"
+# property in devcontainer.json to use it. On Linux, the container user's GID/UIDs
+# will be updated to match your local UID/GID (when using the dockerFile property).
+# See https://aka.ms/vscode-remote/containers/non-root-user for details.
+ARG USERNAME=vscode
+ARG USER_UID=1000
+ARG USER_GID=$USER_UID
+
+# Configure apt, install packages and tools
+RUN apt-get update \
+    && export DEBIAN_FRONTEND=noninteractive \
+    && apt-get -y install --no-install-recommends apt-utils dialog 2>&1 \
+    #
+    # Verify git, process tools, lsb-release (common in install instructions for CLIs) installed
+    && apt-get -y install git openssh-client less iproute2 procps lsb-release \
+    #
+    # Build Go tools w/module support
+    && mkdir -p /tmp/gotools \
+    && cd /tmp/gotools \
+    && GOPATH=/tmp/gotools GO111MODULE=on go get -v golang.org/x/tools/gopls@latest 2>&1 \
+    && GOPATH=/tmp/gotools GO111MODULE=on go get -v \
+        honnef.co/go/tools/...@latest \
+        golang.org/x/tools/cmd/gorename@latest \
+        golang.org/x/tools/cmd/goimports@latest \
+        golang.org/x/tools/cmd/guru@latest \
+        golang.org/x/lint/golint@latest \
+        github.com/mdempsky/gocode@latest \
+        github.com/cweill/gotests/...@latest \
+        github.com/haya14busa/goplay/cmd/goplay@latest \
+        github.com/sqs/goreturns@latest \
+        github.com/josharian/impl@latest \
+        github.com/davidrjenni/reftools/cmd/fillstruct@latest \
+        github.com/uudashr/gopkgs/v2/cmd/gopkgs@latest  \
+        github.com/ramya-rao-a/go-outline@latest  \
+        github.com/acroca/go-symbols@latest  \
+        github.com/godoctor/godoctor@latest  \
+        github.com/rogpeppe/godef@latest  \
+        github.com/zmb3/gogetdoc@latest \
+        github.com/fatih/gomodifytags@latest  \
+        github.com/mgechev/revive@latest  \
+        github.com/go-delve/delve/cmd/dlv@latest 2>&1 \
+    #
+    # Build Go tools w/o module support
+    && GOPATH=/tmp/gotools go get -v github.com/alecthomas/gometalinter 2>&1 \
+    #
+    # Build gocode-gomod
+    && GOPATH=/tmp/gotools go get -x -d github.com/stamblerre/gocode 2>&1 \
+    && GOPATH=/tmp/gotools go build -o gocode-gomod github.com/stamblerre/gocode \
+    #
+    # Install Go tools
+    && mv /tmp/gotools/bin/* /usr/local/bin/ \
+    && mv gocode-gomod /usr/local/bin/ \
+    #
+    # Install golangci-lint
+    && curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b /usr/local/bin 2>&1 \
+    #
+    # Create a non-root user to use if preferred - see https://aka.ms/vscode-remote/containers/non-root-user.
+    && groupadd --gid $USER_GID $USERNAME \
+    && useradd -s /bin/bash --uid $USER_UID --gid $USER_GID -m $USERNAME \
+    # [Optional] Add sudo support
+    && apt-get install -y sudo \
+    && echo $USERNAME ALL=\(root\) NOPASSWD:ALL > /etc/sudoers.d/$USERNAME \
+    && chmod 0440 /etc/sudoers.d/$USERNAME \
+    #
+    # Clean up
+    && apt-get autoremove -y \
+    && apt-get clean -y \
+    && rm -rf /var/lib/apt/lists/* /tmp/gotools
+
+# Update this to "on" or "off" as appropriate
+ENV GO111MODULE=auto
+
+#Install Oracle Client
+RUN apt-get update &&\
+    apt-get -y install unzip libaio1 && \
+    mkdir /opt/oracle &&\
+    curl -o /opt/oracle/oracle.zip https://download.oracle.com/otn_software/linux/instantclient/19600/instantclient-basiclite-linux.x64-19.6.0.0.0dbru.zip &&\
+    cd /opt/oracle &&\
+    unzip oracle.zip &&\
+    rm oracle.zip
+
+ENV LD_LIBRARY_PATH=/opt/oracle/instantclient_19_6:$LD_LIBRARY_PATH
+
diff --git a/microservices/oracle-db-connection-write/.devcontainer/devcontainer.json b/microservices/oracle-db-connection-write/.devcontainer/devcontainer.json
new file mode 100644
index 0000000..faba3ff
--- /dev/null
+++ b/microservices/oracle-db-connection-write/.devcontainer/devcontainer.json
@@ -0,0 +1,27 @@
+// For format details, see https://aka.ms/vscode-remote/devcontainer.json or this file's README at:
+// https://github.com/microsoft/vscode-dev-containers/tree/v0.122.1/containers/go
+{
+	"name": "Go",
+	"dockerFile": "Dockerfile",
+	"runArgs": [ "--cap-add=SYS_PTRACE", "--security-opt", "seccomp=unconfined" ],
+
+	// Set *default* container specific settings.json values on container create.
+	"settings": {
+		"terminal.integrated.shell.linux": "/bin/bash",
+		"go.gopath": "/go"
+	},
+
+	// Add the IDs of extensions you want installed when the container is created.
+	"extensions": [
+		"golang.Go"
+	]
+
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	// "forwardPorts": [],
+
+	// Use 'postCreateCommand' to run commands after the container is created.
+	,"postCreateCommand": "go get",
+
+	// Uncomment to connect as a non-root user. See https://aka.ms/vscode-remote/containers/non-root.
+	// "remoteUser": "vscode"
+}
\ No newline at end of file
diff --git a/microservices/oracle-db-connection-write/go.mod b/microservices/oracle-db-connection-write/go.mod
new file mode 100644
index 0000000..aa16802
--- /dev/null
+++ b/microservices/oracle-db-connection-write/go.mod
@@ -0,0 +1,5 @@
+module golang.source-fellows.com/samples/oracle
+
+go 1.14
+
+require github.com/godror/godror v0.17.0
diff --git a/microservices/oracle-db-connection-write/go.sum b/microservices/oracle-db-connection-write/go.sum
new file mode 100644
index 0000000..b224ccc
--- /dev/null
+++ b/microservices/oracle-db-connection-write/go.sum
@@ -0,0 +1,7 @@
+github.com/go-logfmt/logfmt v0.5.0/go.mod h1:wCYkCAKZfumFQihp8CzCvQ3paCTfi41vtzG1KdI/P7A=
+github.com/godror/godror v0.17.0 h1:ClVuKG0qCj6f182BruhwgHS8xCgfpQp35pTrefSq4NE=
+github.com/godror/godror v0.17.0/go.mod h1:DE94Br7LXn4dQGCexePriVrKotR9GkVzPPT5nnm8dj0=
+github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
diff --git a/microservices/oracle-db-connection-write/main.go b/microservices/oracle-db-connection-write/main.go
new file mode 100644
index 0000000..aba61b0
--- /dev/null
+++ b/microservices/oracle-db-connection-write/main.go
@@ -0,0 +1,48 @@
+package main
+
+import (
+	"database/sql"
+	"log"
+	"time"
+
+	_ "github.com/godror/godror"
+)
+
+type Angestellter struct {
+	id                int
+	Name              string
+	Einstellungsdatum time.Time
+}
+
+func main() {
+	db, err := sql.Open("godror", "app/app@(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=tcp)(HOST=172.17.0.1)(PORT=1521)))(CONNECT_DATA=(SID=ORCLCDB)))")
+	if err != nil {
+		log.Fatal(err)
+	}
+	db.SetMaxOpenConns(0)
+	db.SetMaxIdleConns(0)
+	defer db.Close()
+	res, err := db.Exec("INSERT INTO EMP (EMPNO, ENAME, HIREDATE) VALUES(:id1, :name1, :date1)", 1, "WURST", time.Now())
+	if err != nil {
+		log.Fatalf("Fehler bei Exec: %v", err)
+	}
+	count, _ := res.RowsAffected()
+	log.Printf("Updated %v row", count)
+
+	stmt, err := db.Prepare("INSERT INTO EMP (EMPNO, ENAME, HIREDATE) VALUES(:id1, :name2, :date3)")
+	if err != nil {
+		log.Fatalf("Fehler bei Statement: %v", err)
+	}
+	for i := 10; i < 100; i++ {
+		_, err = stmt.Exec(
+			sql.Named("id1", i),
+			sql.Named("name2", "JOE"),
+			sql.Named("date3", time.Now()))
+
+		if err != nil {
+			log.Fatalf("Fehler bei Exec: %v", err)
+		}
+	}
+	defer stmt.Close()
+
+}
diff --git a/microservices/oracle-db-connection/.devcontainer/Dockerfile b/microservices/oracle-db-connection/.devcontainer/Dockerfile
new file mode 100644
index 0000000..4190530
--- /dev/null
+++ b/microservices/oracle-db-connection/.devcontainer/Dockerfile
@@ -0,0 +1,90 @@
+#-------------------------------------------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See https://go.microsoft.com/fwlink/?linkid=2090316 for license information.
+#-------------------------------------------------------------------------------------------------------------
+
+FROM golang:1
+
+# This Dockerfile adds a non-root user with sudo access. Use the "remoteUser"
+# property in devcontainer.json to use it. On Linux, the container user's GID/UIDs
+# will be updated to match your local UID/GID (when using the dockerFile property).
+# See https://aka.ms/vscode-remote/containers/non-root-user for details.
+ARG USERNAME=vscode
+ARG USER_UID=1000
+ARG USER_GID=$USER_UID
+
+# Configure apt, install packages and tools
+RUN apt-get update \
+    && export DEBIAN_FRONTEND=noninteractive \
+    && apt-get -y install --no-install-recommends apt-utils dialog 2>&1 \
+    #
+    # Verify git, process tools, lsb-release (common in install instructions for CLIs) installed
+    && apt-get -y install git openssh-client less iproute2 procps lsb-release \
+    #
+    # Build Go tools w/module support
+    && mkdir -p /tmp/gotools \
+    && cd /tmp/gotools \
+    && GOPATH=/tmp/gotools GO111MODULE=on go get -v golang.org/x/tools/gopls@latest 2>&1 \
+    && GOPATH=/tmp/gotools GO111MODULE=on go get -v \
+        honnef.co/go/tools/...@latest \
+        golang.org/x/tools/cmd/gorename@latest \
+        golang.org/x/tools/cmd/goimports@latest \
+        golang.org/x/tools/cmd/guru@latest \
+        golang.org/x/lint/golint@latest \
+        github.com/mdempsky/gocode@latest \
+        github.com/cweill/gotests/...@latest \
+        github.com/haya14busa/goplay/cmd/goplay@latest \
+        github.com/sqs/goreturns@latest \
+        github.com/josharian/impl@latest \
+        github.com/davidrjenni/reftools/cmd/fillstruct@latest \
+        github.com/uudashr/gopkgs/v2/cmd/gopkgs@latest  \
+        github.com/ramya-rao-a/go-outline@latest  \
+        github.com/acroca/go-symbols@latest  \
+        github.com/godoctor/godoctor@latest  \
+        github.com/rogpeppe/godef@latest  \
+        github.com/zmb3/gogetdoc@latest \
+        github.com/fatih/gomodifytags@latest  \
+        github.com/mgechev/revive@latest  \
+        github.com/go-delve/delve/cmd/dlv@latest 2>&1 \
+    #
+    # Build Go tools w/o module support
+    && GOPATH=/tmp/gotools go get -v github.com/alecthomas/gometalinter 2>&1 \
+    #
+    # Build gocode-gomod
+    && GOPATH=/tmp/gotools go get -x -d github.com/stamblerre/gocode 2>&1 \
+    && GOPATH=/tmp/gotools go build -o gocode-gomod github.com/stamblerre/gocode \
+    #
+    # Install Go tools
+    && mv /tmp/gotools/bin/* /usr/local/bin/ \
+    && mv gocode-gomod /usr/local/bin/ \
+    #
+    # Install golangci-lint
+    && curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b /usr/local/bin 2>&1 \
+    #
+    # Create a non-root user to use if preferred - see https://aka.ms/vscode-remote/containers/non-root-user.
+    && groupadd --gid $USER_GID $USERNAME \
+    && useradd -s /bin/bash --uid $USER_UID --gid $USER_GID -m $USERNAME \
+    # [Optional] Add sudo support
+    && apt-get install -y sudo \
+    && echo $USERNAME ALL=\(root\) NOPASSWD:ALL > /etc/sudoers.d/$USERNAME \
+    && chmod 0440 /etc/sudoers.d/$USERNAME \
+    #
+    # Clean up
+    && apt-get autoremove -y \
+    && apt-get clean -y \
+    && rm -rf /var/lib/apt/lists/* /tmp/gotools
+
+# Update this to "on" or "off" as appropriate
+ENV GO111MODULE=auto
+
+#Install Oracle Client
+RUN apt-get update &&\
+    apt-get -y install unzip libaio1 && \
+    mkdir /opt/oracle &&\
+    curl -o /opt/oracle/oracle.zip https://download.oracle.com/otn_software/linux/instantclient/19600/instantclient-basiclite-linux.x64-19.6.0.0.0dbru.zip &&\
+    cd /opt/oracle &&\
+    unzip oracle.zip &&\
+    rm oracle.zip
+
+ENV LD_LIBRARY_PATH=/opt/oracle/instantclient_19_6:$LD_LIBRARY_PATH
+
diff --git a/microservices/oracle-db-connection/.devcontainer/devcontainer.json b/microservices/oracle-db-connection/.devcontainer/devcontainer.json
new file mode 100644
index 0000000..faba3ff
--- /dev/null
+++ b/microservices/oracle-db-connection/.devcontainer/devcontainer.json
@@ -0,0 +1,27 @@
+// For format details, see https://aka.ms/vscode-remote/devcontainer.json or this file's README at:
+// https://github.com/microsoft/vscode-dev-containers/tree/v0.122.1/containers/go
+{
+	"name": "Go",
+	"dockerFile": "Dockerfile",
+	"runArgs": [ "--cap-add=SYS_PTRACE", "--security-opt", "seccomp=unconfined" ],
+
+	// Set *default* container specific settings.json values on container create.
+	"settings": {
+		"terminal.integrated.shell.linux": "/bin/bash",
+		"go.gopath": "/go"
+	},
+
+	// Add the IDs of extensions you want installed when the container is created.
+	"extensions": [
+		"golang.Go"
+	]
+
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	// "forwardPorts": [],
+
+	// Use 'postCreateCommand' to run commands after the container is created.
+	,"postCreateCommand": "go get",
+
+	// Uncomment to connect as a non-root user. See https://aka.ms/vscode-remote/containers/non-root.
+	// "remoteUser": "vscode"
+}
\ No newline at end of file
diff --git a/microservices/oracle-db-connection/go.mod b/microservices/oracle-db-connection/go.mod
new file mode 100644
index 0000000..aa16802
--- /dev/null
+++ b/microservices/oracle-db-connection/go.mod
@@ -0,0 +1,5 @@
+module golang.source-fellows.com/samples/oracle
+
+go 1.14
+
+require github.com/godror/godror v0.17.0
diff --git a/microservices/oracle-db-connection/go.sum b/microservices/oracle-db-connection/go.sum
new file mode 100644
index 0000000..b224ccc
--- /dev/null
+++ b/microservices/oracle-db-connection/go.sum
@@ -0,0 +1,7 @@
+github.com/go-logfmt/logfmt v0.5.0/go.mod h1:wCYkCAKZfumFQihp8CzCvQ3paCTfi41vtzG1KdI/P7A=
+github.com/godror/godror v0.17.0 h1:ClVuKG0qCj6f182BruhwgHS8xCgfpQp35pTrefSq4NE=
+github.com/godror/godror v0.17.0/go.mod h1:DE94Br7LXn4dQGCexePriVrKotR9GkVzPPT5nnm8dj0=
+github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
diff --git a/microservices/oracle-db-connection/main.go b/microservices/oracle-db-connection/main.go
new file mode 100644
index 0000000..f8f00ca
--- /dev/null
+++ b/microservices/oracle-db-connection/main.go
@@ -0,0 +1,38 @@
+package main
+
+import (
+	"database/sql"
+	"log"
+	"time"
+
+	_ "github.com/godror/godror"
+)
+
+type Angestellter struct {
+	id                int
+	Name              string
+	Einstellungsdatum time.Time
+}
+
+func main() {
+	db, err := sql.Open("godror", "app/app@(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=tcp)(HOST=172.17.0.1)(PORT=1521)))(CONNECT_DATA=(SID=ORCLCDB)))")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer db.Close()
+	rows, err := db.Query("select EMPNO, ENAME, HIREDATE from EMP where EMPNO = :0", 7499)
+	if err != nil {
+		log.Fatalf("Fehler bei Query: %v", err)
+	}
+	defer rows.Close()
+	for rows.Next() {
+		angestellter := &Angestellter{}
+		err = rows.Scan(&angestellter.id,
+			&angestellter.Name,
+			&angestellter.Einstellungsdatum)
+		if err != nil {
+			log.Fatalf("Fehler beim Laden: %v", err)
+		}
+		log.Println(angestellter)
+	}
+}
diff --git a/microservices/prometheus-metrics/go.mod b/microservices/prometheus-metrics/go.mod
new file mode 100644
index 0000000..f3f7640
--- /dev/null
+++ b/microservices/prometheus-metrics/go.mod
@@ -0,0 +1,5 @@
+module golang.source-fellows.com/samples/prometheusmetric
+
+go 1.14
+
+require github.com/prometheus/client_golang v1.7.1
diff --git a/microservices/prometheus-metrics/go.sum b/microservices/prometheus-metrics/go.sum
new file mode 100644
index 0000000..35420e8
--- /dev/null
+++ b/microservices/prometheus-metrics/go.sum
@@ -0,0 +1,104 @@
+github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
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diff --git a/microservices/prometheus-metrics/main.go b/microservices/prometheus-metrics/main.go
new file mode 100644
index 0000000..cd41e7c
--- /dev/null
+++ b/microservices/prometheus-metrics/main.go
@@ -0,0 +1,36 @@
+package main
+
+import (
+	"fmt"
+	"net/http"
+
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/promauto"
+	"github.com/prometheus/client_golang/prometheus/promhttp"
+)
+
+var (
+	postCallsCounter = promauto.NewCounter(prometheus.CounterOpts{
+		Name: "myapp_processed_post_total",
+		Help: "The total number of POST requests",
+	})
+	getCallsCounter = promauto.NewCounter(prometheus.CounterOpts{
+		Name: "myapp_processed_get_total",
+		Help: "The total number of GET requests",
+	})
+)
+
+func main() {
+	http.HandleFunc("/do", func(rs http.ResponseWriter, rq *http.Request) {
+
+		if rq.Method == http.MethodPost {
+			postCallsCounter.Add(1)
+		} else if rq.Method == http.MethodGet {
+			getCallsCounter.Add(1)
+		}
+
+		fmt.Fprintln(rs, "Hello World")
+	})
+	http.Handle("/metrics", promhttp.Handler())
+	http.ListenAndServe(":8080", nil)
+}
diff --git a/microservices/prometheus/application/Dockerfile b/microservices/prometheus/application/Dockerfile
new file mode 100644
index 0000000..6eae478
--- /dev/null
+++ b/microservices/prometheus/application/Dockerfile
@@ -0,0 +1,8 @@
+from golang:latest
+
+RUN mkdir /application
+ADD . /application
+WORKDIR /application
+RUN go build -o application .
+
+CMD ["/application/application"]
diff --git a/microservices/prometheus/application/go.mod b/microservices/prometheus/application/go.mod
new file mode 100644
index 0000000..486157c
--- /dev/null
+++ b/microservices/prometheus/application/go.mod
@@ -0,0 +1,5 @@
+module golang.source-fellows.com/samples/prometheus
+
+go 1.14
+
+require github.com/prometheus/client_golang v1.7.1
diff --git a/microservices/prometheus/application/go.sum b/microservices/prometheus/application/go.sum
new file mode 100644
index 0000000..35420e8
--- /dev/null
+++ b/microservices/prometheus/application/go.sum
@@ -0,0 +1,104 @@
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diff --git a/microservices/prometheus/application/main.go b/microservices/prometheus/application/main.go
new file mode 100644
index 0000000..64a3ff9
--- /dev/null
+++ b/microservices/prometheus/application/main.go
@@ -0,0 +1,15 @@
+package main
+
+import (
+	"net/http"
+
+	"github.com/prometheus/client_golang/prometheus/promhttp"
+)
+
+func main() {
+	http.HandleFunc("/", func(rs http.ResponseWriter, rq *http.Request) {
+		rs.WriteHeader(http.StatusOK)
+	})
+	http.Handle("/metrics", promhttp.Handler())
+	http.ListenAndServe(":8080", nil)
+}
diff --git a/microservices/prometheus/docker-compose.yml b/microservices/prometheus/docker-compose.yml
new file mode 100644
index 0000000..7ebc338
--- /dev/null
+++ b/microservices/prometheus/docker-compose.yml
@@ -0,0 +1,18 @@
+version: '2'
+services:
+  prometheus:
+    image: prom/prometheus
+    ports:
+      - "9090:9090"
+    volumes:
+      - ./prometheus/prometheus.yml:/etc/prometheus/prometheus.yml
+  application:
+    build: application
+    ports:
+      - "8080:8080"
+  grafana:
+    image: grafana/grafana
+    ports:
+      - "3000:3000"
+    volumes:
+      - ./grafana/grafana.ini:/etc/grafana/grafana.ini
\ No newline at end of file
diff --git a/microservices/prometheus/grafana/grafana.ini b/microservices/prometheus/grafana/grafana.ini
new file mode 100644
index 0000000..a184600
--- /dev/null
+++ b/microservices/prometheus/grafana/grafana.ini
@@ -0,0 +1,764 @@
+##################### Grafana Configuration Example #####################
+#
+# Everything has defaults so you only need to uncomment things you want to
+# change
+
+# possible values : production, development
+;app_mode = production
+
+# instance name, defaults to HOSTNAME environment variable value or hostname if HOSTNAME var is empty
+;instance_name = ${HOSTNAME}
+
+#################################### Paths ####################################
+[paths]
+# Path to where grafana can store temp files, sessions, and the sqlite3 db (if that is used)
+;data = /var/lib/grafana
+
+# Temporary files in `data` directory older than given duration will be removed
+;temp_data_lifetime = 24h
+
+# Directory where grafana can store logs
+;logs = /var/log/grafana
+
+# Directory where grafana will automatically scan and look for plugins
+;plugins = /var/lib/grafana/plugins
+
+# folder that contains provisioning config files that grafana will apply on startup and while running.
+;provisioning = conf/provisioning
+
+#################################### Server ####################################
+[server]
+# Protocol (http, https, h2, socket)
+;protocol = http
+
+# The ip address to bind to, empty will bind to all interfaces
+;http_addr =
+
+# The http port  to use
+;http_port = 3000
+
+# The public facing domain name used to access grafana from a browser
+;domain = localhost
+
+# Redirect to correct domain if host header does not match domain
+# Prevents DNS rebinding attacks
+;enforce_domain = false
+
+# The full public facing url you use in browser, used for redirects and emails
+# If you use reverse proxy and sub path specify full url (with sub path)
+;root_url = %(protocol)s://%(domain)s:%(http_port)s/
+
+# Serve Grafana from subpath specified in `root_url` setting. By default it is set to `false` for compatibility reasons.
+;serve_from_sub_path = false
+
+# Log web requests
+;router_logging = false
+
+# the path relative working path
+;static_root_path = public
+
+# enable gzip
+;enable_gzip = false
+
+# https certs & key file
+;cert_file =
+;cert_key =
+
+# Unix socket path
+;socket =
+
+#################################### Database ####################################
+[database]
+# You can configure the database connection by specifying type, host, name, user and password
+# as separate properties or as on string using the url properties.
+
+# Either "mysql", "postgres" or "sqlite3", it's your choice
+;type = sqlite3
+;host = 127.0.0.1:3306
+;name = grafana
+;user = root
+# If the password contains # or ; you have to wrap it with triple quotes. Ex """#password;"""
+;password =
+
+# Use either URL or the previous fields to configure the database
+# Example: mysql://user:secret@host:port/database
+;url =
+
+# For "postgres" only, either "disable", "require" or "verify-full"
+;ssl_mode = disable
+
+;ca_cert_path =
+;client_key_path =
+;client_cert_path =
+;server_cert_name =
+
+# For "sqlite3" only, path relative to data_path setting
+;path = grafana.db
+
+# Max idle conn setting default is 2
+;max_idle_conn = 2
+
+# Max conn setting default is 0 (mean not set)
+;max_open_conn =
+
+# Connection Max Lifetime default is 14400 (means 14400 seconds or 4 hours)
+;conn_max_lifetime = 14400
+
+# Set to true to log the sql calls and execution times.
+;log_queries =
+
+# For "sqlite3" only. cache mode setting used for connecting to the database. (private, shared)
+;cache_mode = private
+
+#################################### Cache server #############################
+[remote_cache]
+# Either "redis", "memcached" or "database" default is "database"
+;type = database
+
+# cache connectionstring options
+# database: will use Grafana primary database.
+# redis: config like redis server e.g. `addr=127.0.0.1:6379,pool_size=100,db=0,ssl=false`. Only addr is required. ssl may be 'true', 'false', or 'insecure'.
+# memcache: 127.0.0.1:11211
+;connstr =
+
+#################################### Data proxy ###########################
+[dataproxy]
+
+# This enables data proxy logging, default is false
+;logging = false
+
+# How long the data proxy waits before timing out, default is 30 seconds.
+# This setting also applies to core backend HTTP data sources where query requests use an HTTP client with timeout set.
+;timeout = 30
+
+# If enabled and user is not anonymous, data proxy will add X-Grafana-User header with username into the request, default is false.
+;send_user_header = false
+
+#################################### Analytics ####################################
+[analytics]
+# Server reporting, sends usage counters to stats.grafana.org every 24 hours.
+# No ip addresses are being tracked, only simple counters to track
+# running instances, dashboard and error counts. It is very helpful to us.
+# Change this option to false to disable reporting.
+;reporting_enabled = true
+
+# Set to false to disable all checks to https://grafana.net
+# for new versions (grafana itself and plugins), check is used
+# in some UI views to notify that grafana or plugin update exists
+# This option does not cause any auto updates, nor send any information
+# only a GET request to http://grafana.com to get latest versions
+;check_for_updates = true
+
+# Google Analytics universal tracking code, only enabled if you specify an id here
+;google_analytics_ua_id =
+
+# Google Tag Manager ID, only enabled if you specify an id here
+;google_tag_manager_id =
+
+#################################### Security ####################################
+[security]
+# disable creation of admin user on first start of grafana
+;disable_initial_admin_creation = false
+
+# default admin user, created on startup
+;admin_user = admin
+
+# default admin password, can be changed before first start of grafana,  or in profile settings
+;admin_password = admin
+
+# used for signing
+;secret_key = SW2YcwTIb9zpOOhoPsMm
+
+# disable gravatar profile images
+;disable_gravatar = false
+
+# data source proxy whitelist (ip_or_domain:port separated by spaces)
+;data_source_proxy_whitelist =
+
+# disable protection against brute force login attempts
+;disable_brute_force_login_protection = false
+
+# set to true if you host Grafana behind HTTPS. default is false.
+;cookie_secure = false
+
+# set cookie SameSite attribute. defaults to `lax`. can be set to "lax", "strict", "none" and "disabled"
+;cookie_samesite = lax
+
+# set to true if you want to allow browsers to render Grafana in a <frame>, <iframe>, <embed> or <object>. default is false.
+;allow_embedding = false
+
+# Set to true if you want to enable http strict transport security (HSTS) response header.
+# This is only sent when HTTPS is enabled in this configuration.
+# HSTS tells browsers that the site should only be accessed using HTTPS.
+;strict_transport_security = false
+
+# Sets how long a browser should cache HSTS. Only applied if strict_transport_security is enabled.
+;strict_transport_security_max_age_seconds = 86400
+
+# Set to true if to enable HSTS preloading option. Only applied if strict_transport_security is enabled.
+;strict_transport_security_preload = false
+
+# Set to true if to enable the HSTS includeSubDomains option. Only applied if strict_transport_security is enabled.
+;strict_transport_security_subdomains = false
+
+# Set to true to enable the X-Content-Type-Options response header.
+# The X-Content-Type-Options response HTTP header is a marker used by the server to indicate that the MIME types advertised
+# in the Content-Type headers should not be changed and be followed.
+;x_content_type_options = true
+
+# Set to true to enable the X-XSS-Protection header, which tells browsers to stop pages from loading
+# when they detect reflected cross-site scripting (XSS) attacks.
+;x_xss_protection = true
+
+#################################### Snapshots ###########################
+[snapshots]
+# snapshot sharing options
+;external_enabled = true
+;external_snapshot_url = https://snapshots-origin.raintank.io
+;external_snapshot_name = Publish to snapshot.raintank.io
+
+# Set to true to enable this Grafana instance act as an external snapshot server and allow unauthenticated requests for
+# creating and deleting snapshots.
+;public_mode = false
+
+# remove expired snapshot
+;snapshot_remove_expired = true
+
+#################################### Dashboards History ##################
+[dashboards]
+# Number dashboard versions to keep (per dashboard). Default: 20, Minimum: 1
+;versions_to_keep = 20
+
+# Minimum dashboard refresh interval. When set, this will restrict users to set the refresh interval of a dashboard lower than given interval. Per default this is 5 seconds.
+# The interval string is a possibly signed sequence of decimal numbers, followed by a unit suffix (ms, s, m, h, d), e.g. 30s or 1m.
+;min_refresh_interval = 5s
+
+# Path to the default home dashboard. If this value is empty, then Grafana uses StaticRootPath + "dashboards/home.json"
+;default_home_dashboard_path =
+
+#################################### Users ###############################
+[users]
+# disable user signup / registration
+;allow_sign_up = true
+
+# Allow non admin users to create organizations
+;allow_org_create = true
+
+# Set to true to automatically assign new users to the default organization (id 1)
+;auto_assign_org = true
+
+# Set this value to automatically add new users to the provided organization (if auto_assign_org above is set to true)
+;auto_assign_org_id = 1
+
+# Default role new users will be automatically assigned (if disabled above is set to true)
+;auto_assign_org_role = Viewer
+
+# Require email validation before sign up completes
+;verify_email_enabled = false
+
+# Background text for the user field on the login page
+;login_hint = email or username
+;password_hint = password
+
+# Default UI theme ("dark" or "light")
+;default_theme = dark
+
+# External user management, these options affect the organization users view
+;external_manage_link_url =
+;external_manage_link_name =
+;external_manage_info =
+
+# Viewers can edit/inspect dashboard settings in the browser. But not save the dashboard.
+;viewers_can_edit = false
+
+# Editors can administrate dashboard, folders and teams they create
+;editors_can_admin = false
+
+[auth]
+# Login cookie name
+;login_cookie_name = grafana_session
+
+# The lifetime (days) an authenticated user can be inactive before being required to login at next visit. Default is 7 days,
+;login_maximum_inactive_lifetime_days = 7
+
+# The maximum lifetime (days) an authenticated user can be logged in since login time before being required to login. Default is 30 days.
+;login_maximum_lifetime_days = 30
+
+# How often should auth tokens be rotated for authenticated users when being active. The default is each 10 minutes.
+;token_rotation_interval_minutes = 10
+
+# Set to true to disable (hide) the login form, useful if you use OAuth, defaults to false
+;disable_login_form = false
+
+# Set to true to disable the signout link in the side menu. useful if you use auth.proxy, defaults to false
+;disable_signout_menu = false
+
+# URL to redirect the user to after sign out
+;signout_redirect_url =
+
+# Set to true to attempt login with OAuth automatically, skipping the login screen.
+# This setting is ignored if multiple OAuth providers are configured.
+;oauth_auto_login = false
+
+# OAuth state max age cookie duration. Defaults to 60 seconds.
+;oauth_state_cookie_max_age = 60
+
+# limit of api_key seconds to live before expiration
+;api_key_max_seconds_to_live = -1
+
+#################################### Anonymous Auth ######################
+[auth.anonymous]
+# enable anonymous access
+;enabled = false
+
+# specify organization name that should be used for unauthenticated users
+;org_name = Main Org.
+
+# specify role for unauthenticated users
+;org_role = Viewer
+
+# mask the Grafana version number for unauthenticated users
+;hide_version = false
+
+#################################### Github Auth ##########################
+[auth.github]
+;enabled = false
+;allow_sign_up = true
+;client_id = some_id
+;client_secret = some_secret
+;scopes = user:email,read:org
+;auth_url = https://github.com/login/oauth/authorize
+;token_url = https://github.com/login/oauth/access_token
+;api_url = https://api.github.com/user
+;allowed_domains =
+;team_ids =
+;allowed_organizations =
+
+#################################### GitLab Auth #########################
+[auth.gitlab]
+;enabled = false
+;allow_sign_up = true
+;client_id = some_id
+;client_secret = some_secret
+;scopes = api
+;auth_url = https://gitlab.com/oauth/authorize
+;token_url = https://gitlab.com/oauth/token
+;api_url = https://gitlab.com/api/v4
+;allowed_domains =
+;allowed_groups =
+
+#################################### Google Auth ##########################
+[auth.google]
+;enabled = false
+;allow_sign_up = true
+;client_id = some_client_id
+;client_secret = some_client_secret
+;scopes = https://www.googleapis.com/auth/userinfo.profile https://www.googleapis.com/auth/userinfo.email
+;auth_url = https://accounts.google.com/o/oauth2/auth
+;token_url = https://accounts.google.com/o/oauth2/token
+;api_url = https://www.googleapis.com/oauth2/v1/userinfo
+;allowed_domains =
+;hosted_domain =
+
+#################################### Grafana.com Auth ####################
+[auth.grafana_com]
+;enabled = false
+;allow_sign_up = true
+;client_id = some_id
+;client_secret = some_secret
+;scopes = user:email
+;allowed_organizations =
+
+#################################### Azure AD OAuth #######################
+[auth.azuread]
+;name = Azure AD
+;enabled = false
+;allow_sign_up = true
+;client_id = some_client_id
+;client_secret = some_client_secret
+;scopes = openid email profile
+;auth_url = https://login.microsoftonline.com/<tenant-id>/oauth2/v2.0/authorize
+;token_url = https://login.microsoftonline.com/<tenant-id>/oauth2/v2.0/token
+;allowed_domains =
+;allowed_groups =
+
+#################################### Okta OAuth #######################
+[auth.okta]
+;name = Okta
+;enabled = false
+;allow_sign_up = true
+;client_id = some_id
+;client_secret = some_secret
+;scopes = openid profile email groups
+;auth_url = https://<tenant-id>.okta.com/oauth2/v1/authorize
+;token_url = https://<tenant-id>.okta.com/oauth2/v1/token
+;api_url = https://<tenant-id>.okta.com/oauth2/v1/userinfo
+;allowed_domains =
+;allowed_groups =
+;role_attribute_path =
+
+#################################### Generic OAuth ##########################
+[auth.generic_oauth]
+;enabled = false
+;name = OAuth
+;allow_sign_up = true
+;client_id = some_id
+;client_secret = some_secret
+;scopes = user:email,read:org
+;email_attribute_name = email:primary
+;email_attribute_path =
+;auth_url = https://foo.bar/login/oauth/authorize
+;token_url = https://foo.bar/login/oauth/access_token
+;api_url = https://foo.bar/user
+;allowed_domains =
+;team_ids =
+;allowed_organizations =
+;role_attribute_path =
+;tls_skip_verify_insecure = false
+;tls_client_cert =
+;tls_client_key =
+;tls_client_ca =
+
+#################################### Basic Auth ##########################
+[auth.basic]
+;enabled = true
+
+#################################### Auth Proxy ##########################
+[auth.proxy]
+;enabled = false
+;header_name = X-WEBAUTH-USER
+;header_property = username
+;auto_sign_up = true
+;sync_ttl = 60
+;whitelist = 192.168.1.1, 192.168.2.1
+;headers = Email:X-User-Email, Name:X-User-Name
+# Read the auth proxy docs for details on what the setting below enables
+;enable_login_token = false
+
+#################################### Auth LDAP ##########################
+[auth.ldap]
+;enabled = false
+;config_file = /etc/grafana/ldap.toml
+;allow_sign_up = true
+
+# LDAP backround sync (Enterprise only)
+# At 1 am every day
+;sync_cron = "0 0 1 * * *"
+;active_sync_enabled = true
+
+#################################### SMTP / Emailing ##########################
+[smtp]
+;enabled = false
+;host = localhost:25
+;user =
+# If the password contains # or ; you have to wrap it with triple quotes. Ex """#password;"""
+;password =
+;cert_file =
+;key_file =
+;skip_verify = false
+;from_address = admin@grafana.localhost
+;from_name = Grafana
+# EHLO identity in SMTP dialog (defaults to instance_name)
+;ehlo_identity = dashboard.example.com
+# SMTP startTLS policy (defaults to 'OpportunisticStartTLS')
+;startTLS_policy = NoStartTLS
+
+[emails]
+;welcome_email_on_sign_up = false
+;templates_pattern = emails/*.html
+
+#################################### Logging ##########################
+[log]
+# Either "console", "file", "syslog". Default is console and  file
+# Use space to separate multiple modes, e.g. "console file"
+;mode = console file
+
+# Either "debug", "info", "warn", "error", "critical", default is "info"
+;level = info
+
+# optional settings to set different levels for specific loggers. Ex filters = sqlstore:debug
+;filters =
+
+# For "console" mode only
+[log.console]
+;level =
+
+# log line format, valid options are text, console and json
+;format = console
+
+# For "file" mode only
+[log.file]
+;level =
+
+# log line format, valid options are text, console and json
+;format = text
+
+# This enables automated log rotate(switch of following options), default is true
+;log_rotate = true
+
+# Max line number of single file, default is 1000000
+;max_lines = 1000000
+
+# Max size shift of single file, default is 28 means 1 << 28, 256MB
+;max_size_shift = 28
+
+# Segment log daily, default is true
+;daily_rotate = true
+
+# Expired days of log file(delete after max days), default is 7
+;max_days = 7
+
+[log.syslog]
+;level =
+
+# log line format, valid options are text, console and json
+;format = text
+
+# Syslog network type and address. This can be udp, tcp, or unix. If left blank, the default unix endpoints will be used.
+;network =
+;address =
+
+# Syslog facility. user, daemon and local0 through local7 are valid.
+;facility =
+
+# Syslog tag. By default, the process' argv[0] is used.
+;tag =
+
+#################################### Usage Quotas ########################
+[quota]
+; enabled = false
+
+#### set quotas to -1 to make unlimited. ####
+# limit number of users per Org.
+; org_user = 10
+
+# limit number of dashboards per Org.
+; org_dashboard = 100
+
+# limit number of data_sources per Org.
+; org_data_source = 10
+
+# limit number of api_keys per Org.
+; org_api_key = 10
+
+# limit number of orgs a user can create.
+; user_org = 10
+
+# Global limit of users.
+; global_user = -1
+
+# global limit of orgs.
+; global_org = -1
+
+# global limit of dashboards
+; global_dashboard = -1
+
+# global limit of api_keys
+; global_api_key = -1
+
+# global limit on number of logged in users.
+; global_session = -1
+
+#################################### Alerting ############################
+[alerting]
+# Disable alerting engine & UI features
+;enabled = true
+# Makes it possible to turn off alert rule execution but alerting UI is visible
+;execute_alerts = true
+
+# Default setting for new alert rules. Defaults to categorize error and timeouts as alerting. (alerting, keep_state)
+;error_or_timeout = alerting
+
+# Default setting for how Grafana handles nodata or null values in alerting. (alerting, no_data, keep_state, ok)
+;nodata_or_nullvalues = no_data
+
+# Alert notifications can include images, but rendering many images at the same time can overload the server
+# This limit will protect the server from render overloading and make sure notifications are sent out quickly
+;concurrent_render_limit = 5
+
+
+# Default setting for alert calculation timeout. Default value is 30
+;evaluation_timeout_seconds = 30
+
+# Default setting for alert notification timeout. Default value is 30
+;notification_timeout_seconds = 30
+
+# Default setting for max attempts to sending alert notifications. Default value is 3
+;max_attempts = 3
+
+# Makes it possible to enforce a minimal interval between evaluations, to reduce load on the backend
+;min_interval_seconds = 1
+
+#################################### Explore #############################
+[explore]
+# Enable the Explore section
+;enabled = true
+
+#################################### Internal Grafana Metrics ##########################
+# Metrics available at HTTP API Url /metrics
+[metrics]
+# Disable / Enable internal metrics
+;enabled           = true
+# Graphite Publish interval
+;interval_seconds  = 10
+# Disable total stats (stat_totals_*) metrics to be generated
+;disable_total_stats = false
+
+#If both are set, basic auth will be required for the metrics endpoint.
+; basic_auth_username =
+; basic_auth_password =
+
+# Send internal metrics to Graphite
+[metrics.graphite]
+# Enable by setting the address setting (ex localhost:2003)
+;address =
+;prefix = prod.grafana.%(instance_name)s.
+
+#################################### Grafana.com integration  ##########################
+# Url used to import dashboards directly from Grafana.com
+[grafana_com]
+;url = https://grafana.com
+
+#################################### Distributed tracing ############
+[tracing.jaeger]
+# Enable by setting the address sending traces to jaeger (ex localhost:6831)
+;address = localhost:6831
+# Tag that will always be included in when creating new spans. ex (tag1:value1,tag2:value2)
+;always_included_tag = tag1:value1
+# Type specifies the type of the sampler: const, probabilistic, rateLimiting, or remote
+;sampler_type = const
+# jaeger samplerconfig param
+# for "const" sampler, 0 or 1 for always false/true respectively
+# for "probabilistic" sampler, a probability between 0 and 1
+# for "rateLimiting" sampler, the number of spans per second
+# for "remote" sampler, param is the same as for "probabilistic"
+# and indicates the initial sampling rate before the actual one
+# is received from the mothership
+;sampler_param = 1
+# Whether or not to use Zipkin propagation (x-b3- HTTP headers).
+;zipkin_propagation = false
+# Setting this to true disables shared RPC spans.
+# Not disabling is the most common setting when using Zipkin elsewhere in your infrastructure.
+;disable_shared_zipkin_spans = false
+
+#################################### External image storage ##########################
+[external_image_storage]
+# Used for uploading images to public servers so they can be included in slack/email messages.
+# you can choose between (s3, webdav, gcs, azure_blob, local)
+;provider =
+
+[external_image_storage.s3]
+;endpoint =
+;path_style_access =
+;bucket =
+;region =
+;path =
+;access_key =
+;secret_key =
+
+[external_image_storage.webdav]
+;url =
+;public_url =
+;username =
+;password =
+
+[external_image_storage.gcs]
+;key_file =
+;bucket =
+;path =
+
+[external_image_storage.azure_blob]
+;account_name =
+;account_key =
+;container_name =
+
+[external_image_storage.local]
+# does not require any configuration
+
+[rendering]
+# Options to configure a remote HTTP image rendering service, e.g. using https://github.com/grafana/grafana-image-renderer.
+# URL to a remote HTTP image renderer service, e.g. http://localhost:8081/render, will enable Grafana to render panels and dashboards to PNG-images using HTTP requests to an external service.
+;server_url =
+# If the remote HTTP image renderer service runs on a different server than the Grafana server you may have to configure this to a URL where Grafana is reachable, e.g. http://grafana.domain/.
+;callback_url =
+# Concurrent render request limit affects when the /render HTTP endpoint is used. Rendering many images at the same time can overload the server,
+# which this setting can help protect against by only allowing a certain amount of concurrent requests.
+;concurrent_render_request_limit = 30
+
+[panels]
+# If set to true Grafana will allow script tags in text panels. Not recommended as it enable XSS vulnerabilities.
+;disable_sanitize_html = false
+
+[plugins]
+;enable_alpha = false
+;app_tls_skip_verify_insecure = false
+# Enter a comma-separated list of plugin identifiers to identify plugins that are allowed to be loaded even if they lack a valid signature.
+;allow_loading_unsigned_plugins =
+
+#################################### Grafana Image Renderer Plugin ##########################
+[plugin.grafana-image-renderer]
+# Instruct headless browser instance to use a default timezone when not provided by Grafana, e.g. when rendering panel image of alert.
+# See ICU’s metaZones.txt (https://cs.chromium.org/chromium/src/third_party/icu/source/data/misc/metaZones.txt) for a list of supported
+# timezone IDs. Fallbacks to TZ environment variable if not set.
+;rendering_timezone =
+
+# Instruct headless browser instance to use a default language when not provided by Grafana, e.g. when rendering panel image of alert.
+# Please refer to the HTTP header Accept-Language to understand how to format this value, e.g. 'fr-CH, fr;q=0.9, en;q=0.8, de;q=0.7, *;q=0.5'.
+;rendering_language =
+
+# Instruct headless browser instance to use a default device scale factor when not provided by Grafana, e.g. when rendering panel image of alert.
+# Default is 1. Using a higher value will produce more detailed images (higher DPI), but will require more disk space to store an image.
+;rendering_viewport_device_scale_factor =
+
+# Instruct headless browser instance whether to ignore HTTPS errors during navigation. Per default HTTPS errors are not ignored. Due to
+# the security risk it's not recommended to ignore HTTPS errors.
+;rendering_ignore_https_errors =
+
+# Instruct headless browser instance whether to capture and log verbose information when rendering an image. Default is false and will
+# only capture and log error messages. When enabled, debug messages are captured and logged as well.
+# For the verbose information to be included in the Grafana server log you have to adjust the rendering log level to debug, configure
+# [log].filter = rendering:debug.
+;rendering_verbose_logging =
+
+# Instruct headless browser instance whether to output its debug and error messages into running process of remote rendering service.
+# Default is false. This can be useful to enable (true) when troubleshooting.
+;rendering_dumpio =
+
+# Additional arguments to pass to the headless browser instance. Default is --no-sandbox. The list of Chromium flags can be found
+# here (https://peter.sh/experiments/chromium-command-line-switches/). Multiple arguments is separated with comma-character.
+;rendering_args =
+
+# You can configure the plugin to use a different browser binary instead of the pre-packaged version of Chromium.
+# Please note that this is not recommended, since you may encounter problems if the installed version of Chrome/Chromium is not
+# compatible with the plugin.
+;rendering_chrome_bin =
+
+# Instruct how headless browser instances are created. Default is 'default' and will create a new browser instance on each request.
+# Mode 'clustered' will make sure that only a maximum of browsers/incognito pages can execute concurrently.
+# Mode 'reusable' will have one browser instance and will create a new incognito page on each request.
+;rendering_mode =
+
+# When rendering_mode = clustered you can instruct how many browsers or incognito pages can execute concurrently. Default is 'browser'
+# and will cluster using browser instances.
+# Mode 'context' will cluster using incognito pages.
+;rendering_clustering_mode =
+# When rendering_mode = clustered you can define maximum number of browser instances/incognito pages that can execute concurrently..
+;rendering_clustering_max_concurrency =
+
+# Limit the maximum viewport width, height and device scale factor that can be requested.
+;rendering_viewport_max_width =
+;rendering_viewport_max_height =
+;rendering_viewport_max_device_scale_factor =
+
+# Change the listening host and port of the gRPC server. Default host is 127.0.0.1 and default port is 0 and will automatically assign
+# a port not in use.
+;grpc_host =
+;grpc_port =
+
+[enterprise]
+# Path to a valid Grafana Enterprise license.jwt file
+;license_path =
+
+[feature_toggles]
+# enable features, separated by spaces
+;enable =
\ No newline at end of file
diff --git a/microservices/prometheus/prometheus/prometheus.yml b/microservices/prometheus/prometheus/prometheus.yml
new file mode 100644
index 0000000..2ac0623
--- /dev/null
+++ b/microservices/prometheus/prometheus/prometheus.yml
@@ -0,0 +1,8 @@
+global:
+  scrape_interval:     5s
+  external_labels:
+    monitor: 'sample-monitor'
+scrape_configs:
+  - job_name: 'application'
+    static_configs:
+      - targets: ['application:8080']
\ No newline at end of file
diff --git a/microservices/rfc7808/client/go.mod b/microservices/rfc7808/client/go.mod
new file mode 100644
index 0000000..d80bd52
--- /dev/null
+++ b/microservices/rfc7808/client/go.mod
@@ -0,0 +1,5 @@
+module golang.source-fellows.com/samples/rfc7808/server
+
+go 1.13
+
+require github.com/moogar0880/problems v0.1.1
diff --git a/microservices/rfc7808/client/go.sum b/microservices/rfc7808/client/go.sum
new file mode 100644
index 0000000..932dc5a
--- /dev/null
+++ b/microservices/rfc7808/client/go.sum
@@ -0,0 +1,2 @@
+github.com/moogar0880/problems v0.1.1 h1:bktLhq8NDG/czU2ZziYNigBFksx13RaYe5AVdNmHDT4=
+github.com/moogar0880/problems v0.1.1/go.mod h1:5Dxrk2sD7BfBAgnOzQ1yaTiuCYdGPUh49L8Vhfky62c=
diff --git a/microservices/rfc7808/client/main.go b/microservices/rfc7808/client/main.go
new file mode 100644
index 0000000..d86a357
--- /dev/null
+++ b/microservices/rfc7808/client/main.go
@@ -0,0 +1,26 @@
+package main
+
+import (
+	"encoding/json"
+	"io/ioutil"
+	"log"
+	"net/http"
+
+	"github.com/moogar0880/problems"
+)
+
+func main() {
+	res, err := http.Get("http://localhost:8080/a")
+	if err != nil {
+		log.Fatal("could not request")
+	}
+	defer res.Body.Close()
+	if res.StatusCode != http.StatusOK {
+		problem := &problems.DefaultProblem{}
+		bites, _ := ioutil.ReadAll(res.Body)
+		json.Unmarshal(bites, problem)
+		log.Println(problem.ProblemTitle())
+	} else {
+		log.Println("ok")
+	}
+}
diff --git a/microservices/rfc7808/server/go.mod b/microservices/rfc7808/server/go.mod
new file mode 100644
index 0000000..d33354e
--- /dev/null
+++ b/microservices/rfc7808/server/go.mod
@@ -0,0 +1,5 @@
+module golang.source-fellows.com/samples/rfc7808/server
+
+go 1.13
+
+require github.com/moogar0880/problems v0.1.1 // indirect
diff --git a/microservices/rfc7808/server/go.sum b/microservices/rfc7808/server/go.sum
new file mode 100644
index 0000000..932dc5a
--- /dev/null
+++ b/microservices/rfc7808/server/go.sum
@@ -0,0 +1,2 @@
+github.com/moogar0880/problems v0.1.1 h1:bktLhq8NDG/czU2ZziYNigBFksx13RaYe5AVdNmHDT4=
+github.com/moogar0880/problems v0.1.1/go.mod h1:5Dxrk2sD7BfBAgnOzQ1yaTiuCYdGPUh49L8Vhfky62c=
diff --git a/microservices/rfc7808/server/main.go b/microservices/rfc7808/server/main.go
new file mode 100644
index 0000000..29008f9
--- /dev/null
+++ b/microservices/rfc7808/server/main.go
@@ -0,0 +1,22 @@
+package main
+
+import (
+	"encoding/json"
+	"net/http"
+
+	"github.com/moogar0880/problems"
+)
+
+func handleHttp(res http.ResponseWriter, req *http.Request) {
+	NotFound := problems.NewStatusProblem(http.StatusNotFound)
+	bites, _ := json.Marshal(NotFound)
+	res.WriteHeader(http.StatusNotFound)
+	res.Header().Add("Content-Type", "application/json")
+	res.Write(bites)
+
+}
+
+func main() {
+	http.HandleFunc("/a/", handleHttp)
+	http.ListenAndServe(":8080", nil)
+}
diff --git a/microservices/simple-http/go.mod b/microservices/simple-http/go.mod
new file mode 100644
index 0000000..ea34cd1
--- /dev/null
+++ b/microservices/simple-http/go.mod
@@ -0,0 +1,3 @@
+module golang.source-fellows.com/samples/simplehttp
+
+go 1.13
diff --git a/microservices/simple-http/main.go b/microservices/simple-http/main.go
new file mode 100644
index 0000000..d7f2738
--- /dev/null
+++ b/microservices/simple-http/main.go
@@ -0,0 +1,12 @@
+package main
+
+import "net/http"
+
+func handleHttp(res http.ResponseWriter, req *http.Request) {
+	res.Write([]byte("Hello World"))
+}
+
+func main() {
+	http.HandleFunc("/a/", handleHttp)
+	http.ListenAndServe(":8080", nil)
+}
diff --git a/module-logrus/go.mod b/module-logrus/go.mod
new file mode 100644
index 0000000..6f6bd13
--- /dev/null
+++ b/module-logrus/go.mod
@@ -0,0 +1,5 @@
+module golang.source-fellows.com/samples/modulelogrus
+
+go 1.13
+
+require github.com/sirupsen/logrus v1.6.0
diff --git a/module-logrus/go.sum b/module-logrus/go.sum
new file mode 100644
index 0000000..c57b4b1
--- /dev/null
+++ b/module-logrus/go.sum
@@ -0,0 +1,8 @@
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/konsorten/go-windows-terminal-sequences v1.0.3 h1:CE8S1cTafDpPvMhIxNJKvHsGVBgn1xWYf1NbHQhywc8=
+github.com/konsorten/go-windows-terminal-sequences v1.0.3/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/sirupsen/logrus v1.6.0 h1:UBcNElsrwanuuMsnGSlYmtmgbb23qDR5dG+6X6Oo89I=
+github.com/sirupsen/logrus v1.6.0/go.mod h1:7uNnSEd1DgxDLC74fIahvMZmmYsHGZGEOFrfsX/uA88=
+github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
+golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
diff --git a/module-logrus/main.go b/module-logrus/main.go
new file mode 100644
index 0000000..fa35320
--- /dev/null
+++ b/module-logrus/main.go
@@ -0,0 +1,9 @@
+package main
+
+import (
+	log "github.com/sirupsen/logrus"
+)
+
+func main() {
+	log.Println("Hello World")
+}
diff --git a/quality/http-server-test.v1/go.mod b/quality/http-server-test.v1/go.mod
new file mode 100644
index 0000000..6f92eda
--- /dev/null
+++ b/quality/http-server-test.v1/go.mod
@@ -0,0 +1,3 @@
+module golang.source-fellows.com/samples/http-server-test
+
+go 1.14
diff --git a/quality/http-server-test.v1/main.go b/quality/http-server-test.v1/main.go
new file mode 100644
index 0000000..1b402de
--- /dev/null
+++ b/quality/http-server-test.v1/main.go
@@ -0,0 +1,50 @@
+/*Package main zeigt einen einfachen HTTP Service, der getestet werden soll.
+
+Das Abschalten des Power-Safe Modus unter Linux hilft folgendes Script:
+
+	for i in /sys/devices/system/cpu/cpu[0-7]
+	do
+    	echo performance > $i/cpufreq/scaling_governor
+	done
+
+Die Laufzeitgeschwindigkeit kann zusätzlich über 'ab' (Apache HTTP server benchmarking tool -
+https://httpd.apache.org/docs/2.4/programs/ab.html) betestet werden.
+*/
+package main
+
+import (
+	"encoding/json"
+	"net/http"
+	_ "net/http/pprof"
+	"regexp"
+)
+
+type Result struct {
+	Name string
+}
+
+func myHandler(writer http.ResponseWriter, req *http.Request) {
+	path := req.URL.Path
+	re := regexp.MustCompile("^/json/(.*)$")
+
+	if !re.MatchString(path) {
+		writer.WriteHeader(401)
+		return
+	}
+
+	parts := re.FindStringSubmatch(path)
+	res := &Result{Name: parts[1]}
+	bites, err := json.Marshal(*res)
+	if err != nil {
+		writer.WriteHeader(500)
+		return
+	}
+	writer.Header().Add("Content-Type", "application/json")
+	writer.Write(bites)
+}
+
+func main() {
+	http.HandleFunc("/", myHandler)
+	http.ListenAndServe(":8080", nil)
+}
+
diff --git a/quality/http-server-test.v1/main_test.go b/quality/http-server-test.v1/main_test.go
new file mode 100644
index 0000000..ca0ef4b
--- /dev/null
+++ b/quality/http-server-test.v1/main_test.go
@@ -0,0 +1,36 @@
+package main
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+)
+
+func Test_myHandler(t *testing.T) {
+	type args struct {
+		url          string
+		expectedName string
+	}
+	tests := []struct {
+		name string
+		args args
+	}{
+		{"simple URL", args{"/json/testing", "testing"}},
+		{"simple URL", args{"/json/test/2", "test"}},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			request, err := http.NewRequest(http.MethodGet, tt.args.url, nil)
+			if err != nil {
+				t.Errorf("could not create request for url: %v", tt.args.url)
+			}
+			recorder := httptest.NewRecorder()
+			myHandler(recorder, request)
+			if !strings.Contains(recorder.Body.String(), tt.args.expectedName) {
+				t.Errorf("The response does't contain %v", tt.args.expectedName)
+			}
+		})
+	}
+}
+
diff --git a/quality/http-server-test.v2/go.mod b/quality/http-server-test.v2/go.mod
new file mode 100644
index 0000000..6f92eda
--- /dev/null
+++ b/quality/http-server-test.v2/go.mod
@@ -0,0 +1,3 @@
+module golang.source-fellows.com/samples/http-server-test
+
+go 1.14
diff --git a/quality/http-server-test.v2/main.go b/quality/http-server-test.v2/main.go
new file mode 100644
index 0000000..d0dab65
--- /dev/null
+++ b/quality/http-server-test.v2/main.go
@@ -0,0 +1,37 @@
+package main
+
+import (
+	"encoding/json"
+	"net/http"
+	_ "net/http/pprof"
+	"regexp"
+)
+
+var re = regexp.MustCompile("^/json/(.*)$")
+
+type Result struct {
+	Name string
+}
+
+func myHandler(writer http.ResponseWriter, req *http.Request) {
+	path := req.URL.Path
+
+	if !re.MatchString(path) {
+		writer.WriteHeader(http.StatusNotImplemented)
+		return
+	}
+	parts := re.FindStringSubmatch(path)
+	res := &Result{Name: parts[1]}
+	bites, err := json.Marshal(*res)
+	if err != nil {
+		writer.WriteHeader(500)
+		return
+	}
+	writer.Header().Add("Content-Type", "application/json")
+	writer.Write(bites)
+}
+
+func main() {
+	http.HandleFunc("/", myHandler)
+	http.ListenAndServe(":8080", nil)
+}
diff --git a/quality/http-server-test.v2/main_test.go b/quality/http-server-test.v2/main_test.go
new file mode 100644
index 0000000..8dd6bb6
--- /dev/null
+++ b/quality/http-server-test.v2/main_test.go
@@ -0,0 +1,40 @@
+package main
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+)
+
+func Test_myHandler(t *testing.T) {
+	type args struct {
+		url          string
+		expectedName string
+		status       int
+	}
+	tests := []struct {
+		name string
+		args args
+	}{
+		{"t1", args{"/json/test", "test", http.StatusOK}},
+		{"t2", args{"/x/y", "", http.StatusNotImplemented}},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			url := tt.args.url
+			req, err := http.NewRequest(http.MethodGet, url, nil)
+			if err != nil {
+				t.Errorf("could't create request: %v", tt.args.url)
+			}
+			recorder := httptest.NewRecorder()
+			myHandler(recorder, req)
+			if recorder.Result().StatusCode != tt.args.status {
+				t.Errorf("Wrong status code %v, expected %v", recorder.Result().StatusCode, tt.args.status)
+			}
+			if !strings.Contains(recorder.Body.String(), tt.args.expectedName) {
+				t.Errorf("The response does't contain '%v': '%v'", tt.args.expectedName, recorder.Body.String())
+			}
+		})
+	}
+}
diff --git a/quality/http-server-test.v2/results.html b/quality/http-server-test.v2/results.html
new file mode 100644
index 0000000..672732a
--- /dev/null
+++ b/quality/http-server-test.v2/results.html
@@ -0,0 +1,119 @@
+<html>
+
+<body>
+
+    <h1>Statische Rückgabe</h1>
+
+<pre>
+package main
+
+import (
+	"net/http"
+	_ "net/http/pprof"
+)
+
+type Result struct {
+	Name string
+}
+
+var bites = []byte("{}")
+
+func myHandler(writer http.ResponseWriter, req *http.Request) {
+
+	writer.Header().Add("Content-Type", "application/json")
+	writer.Write(bites)
+}
+
+func main() {
+	http.HandleFunc("/", myHandler)
+	http.ListenAndServe(":8080", nil)
+}
+</pre>
+
+    <table>
+        <tr>
+            <th colspan=2 bgcolor=white>Server Software:</th>
+            <td colspan=2 bgcolor=white></td>
+        </tr>
+        <tr>
+            <th colspan=2 bgcolor=white>Server Hostname:</th>
+            <td colspan=2 bgcolor=white>localhost</td>
+        </tr>
+        <tr>
+            <th colspan=2 bgcolor=white>Server Port:</th>
+            <td colspan=2 bgcolor=white>8080</td>
+        </tr>
+        <tr>
+            <th colspan=2 bgcolor=white>Document Path:</th>
+            <td colspan=2 bgcolor=white>/Kristian</td>
+        </tr>
+        <tr>
+            <th colspan=2 bgcolor=white>Document Length:</th>
+            <td colspan=2 bgcolor=white>2 bytes</td>
+        </tr>
+        <tr>
+            <th colspan=2 bgcolor=white>Concurrency Level:</th>
+            <td colspan=2 bgcolor=white>3</td>
+        </tr>
+        <tr>
+            <th colspan=2 bgcolor=white>Time taken for tests:</th>
+            <td colspan=2 bgcolor=white>0.401 seconds</td>
+        </tr>
+        <tr>
+            <th colspan=2 bgcolor=white>Complete requests:</th>
+            <td colspan=2 bgcolor=white>10000</td>
+        </tr>
+        <tr>
+            <th colspan=2 bgcolor=white>Failed requests:</th>
+            <td colspan=2 bgcolor=white>0</td>
+        </tr>
+        <tr>
+            <th colspan=2 bgcolor=white>Total transferred:</th>
+            <td colspan=2 bgcolor=white>1090000 bytes</td>
+        </tr>
+        <tr>
+            <th colspan=2 bgcolor=white>HTML transferred:</th>
+            <td colspan=2 bgcolor=white>20000 bytes</td>
+        </tr>
+        <tr>
+            <th colspan=2 bgcolor=white>Requests per second:</th>
+            <td colspan=2 bgcolor=white>24916.72</td>
+        </tr>
+        <tr>
+            <th colspan=2 bgcolor=white>Transfer rate:</th>
+            <td colspan=2 bgcolor=white>2652.27 kb/s received</td>
+        </tr>
+        <tr>
+            <th bgcolor=white colspan=4>Connnection Times (ms)</th>
+        </tr>
+        <tr>
+            <th bgcolor=white>&nbsp;</th>
+            <th bgcolor=white>min</th>
+            <th bgcolor=white>avg</th>
+            <th bgcolor=white>max</th>
+        </tr>
+        <tr>
+            <th bgcolor=white>Connect:</th>
+            <td bgcolor=white> 0</td>
+            <td bgcolor=white> 0</td>
+            <td bgcolor=white> 1</td>
+        </tr>
+        <tr>
+            <th bgcolor=white>Processing:</th>
+            <td bgcolor=white> 0</td>
+            <td bgcolor=white> 0</td>
+            <td bgcolor=white> 0</td>
+        </tr>
+        <tr>
+            <th bgcolor=white>Total:</th>
+            <td bgcolor=white> 0</td>
+            <td bgcolor=white> 0</td>
+            <td bgcolor=white> 1</td>
+        </tr>
+    </table>
+
+
+
+</body>
+
+</html>
\ No newline at end of file
diff --git a/quality/http-server-test.v3/go.mod b/quality/http-server-test.v3/go.mod
new file mode 100644
index 0000000..6f92eda
--- /dev/null
+++ b/quality/http-server-test.v3/go.mod
@@ -0,0 +1,3 @@
+module golang.source-fellows.com/samples/http-server-test
+
+go 1.14
diff --git a/quality/http-server-test.v3/main.go b/quality/http-server-test.v3/main.go
new file mode 100644
index 0000000..e8f1014
--- /dev/null
+++ b/quality/http-server-test.v3/main.go
@@ -0,0 +1,33 @@
+package main
+
+import (
+	"encoding/json"
+	"net/http"
+	_ "net/http/pprof"
+)
+
+type Result struct {
+	Name string
+}
+
+func myHandler(writer http.ResponseWriter, req *http.Request) {
+	path := req.URL.Path
+
+	if len(path) < 6 || path[:6] != "/json/" {
+		writer.WriteHeader(http.StatusNotImplemented)
+		return
+	}
+	res := &Result{Name: path[6:]}
+	bites, err := json.Marshal(*res)
+	if err != nil {
+		writer.WriteHeader(500)
+		return
+	}
+	writer.Header().Add("Content-Type", "application/json")
+	writer.Write(bites)
+}
+
+func main() {
+	http.HandleFunc("/", myHandler)
+	http.ListenAndServe(":8080", nil)
+}
diff --git a/quality/http-server-test.v3/main_test.go b/quality/http-server-test.v3/main_test.go
new file mode 100644
index 0000000..8dd6bb6
--- /dev/null
+++ b/quality/http-server-test.v3/main_test.go
@@ -0,0 +1,40 @@
+package main
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+)
+
+func Test_myHandler(t *testing.T) {
+	type args struct {
+		url          string
+		expectedName string
+		status       int
+	}
+	tests := []struct {
+		name string
+		args args
+	}{
+		{"t1", args{"/json/test", "test", http.StatusOK}},
+		{"t2", args{"/x/y", "", http.StatusNotImplemented}},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			url := tt.args.url
+			req, err := http.NewRequest(http.MethodGet, url, nil)
+			if err != nil {
+				t.Errorf("could't create request: %v", tt.args.url)
+			}
+			recorder := httptest.NewRecorder()
+			myHandler(recorder, req)
+			if recorder.Result().StatusCode != tt.args.status {
+				t.Errorf("Wrong status code %v, expected %v", recorder.Result().StatusCode, tt.args.status)
+			}
+			if !strings.Contains(recorder.Body.String(), tt.args.expectedName) {
+				t.Errorf("The response does't contain '%v': '%v'", tt.args.expectedName, recorder.Body.String())
+			}
+		})
+	}
+}
diff --git a/quality/http-server-test.v3/results.html b/quality/http-server-test.v3/results.html
new file mode 100644
index 0000000..672732a
--- /dev/null
+++ b/quality/http-server-test.v3/results.html
@@ -0,0 +1,119 @@
+<html>
+
+<body>
+
+    <h1>Statische Rückgabe</h1>
+
+<pre>
+package main
+
+import (
+	"net/http"
+	_ "net/http/pprof"
+)
+
+type Result struct {
+	Name string
+}
+
+var bites = []byte("{}")
+
+func myHandler(writer http.ResponseWriter, req *http.Request) {
+
+	writer.Header().Add("Content-Type", "application/json")
+	writer.Write(bites)
+}
+
+func main() {
+	http.HandleFunc("/", myHandler)
+	http.ListenAndServe(":8080", nil)
+}
+</pre>
+
+    <table>
+        <tr>
+            <th colspan=2 bgcolor=white>Server Software:</th>
+            <td colspan=2 bgcolor=white></td>
+        </tr>
+        <tr>
+            <th colspan=2 bgcolor=white>Server Hostname:</th>
+            <td colspan=2 bgcolor=white>localhost</td>
+        </tr>
+        <tr>
+            <th colspan=2 bgcolor=white>Server Port:</th>
+            <td colspan=2 bgcolor=white>8080</td>
+        </tr>
+        <tr>
+            <th colspan=2 bgcolor=white>Document Path:</th>
+            <td colspan=2 bgcolor=white>/Kristian</td>
+        </tr>
+        <tr>
+            <th colspan=2 bgcolor=white>Document Length:</th>
+            <td colspan=2 bgcolor=white>2 bytes</td>
+        </tr>
+        <tr>
+            <th colspan=2 bgcolor=white>Concurrency Level:</th>
+            <td colspan=2 bgcolor=white>3</td>
+        </tr>
+        <tr>
+            <th colspan=2 bgcolor=white>Time taken for tests:</th>
+            <td colspan=2 bgcolor=white>0.401 seconds</td>
+        </tr>
+        <tr>
+            <th colspan=2 bgcolor=white>Complete requests:</th>
+            <td colspan=2 bgcolor=white>10000</td>
+        </tr>
+        <tr>
+            <th colspan=2 bgcolor=white>Failed requests:</th>
+            <td colspan=2 bgcolor=white>0</td>
+        </tr>
+        <tr>
+            <th colspan=2 bgcolor=white>Total transferred:</th>
+            <td colspan=2 bgcolor=white>1090000 bytes</td>
+        </tr>
+        <tr>
+            <th colspan=2 bgcolor=white>HTML transferred:</th>
+            <td colspan=2 bgcolor=white>20000 bytes</td>
+        </tr>
+        <tr>
+            <th colspan=2 bgcolor=white>Requests per second:</th>
+            <td colspan=2 bgcolor=white>24916.72</td>
+        </tr>
+        <tr>
+            <th colspan=2 bgcolor=white>Transfer rate:</th>
+            <td colspan=2 bgcolor=white>2652.27 kb/s received</td>
+        </tr>
+        <tr>
+            <th bgcolor=white colspan=4>Connnection Times (ms)</th>
+        </tr>
+        <tr>
+            <th bgcolor=white>&nbsp;</th>
+            <th bgcolor=white>min</th>
+            <th bgcolor=white>avg</th>
+            <th bgcolor=white>max</th>
+        </tr>
+        <tr>
+            <th bgcolor=white>Connect:</th>
+            <td bgcolor=white> 0</td>
+            <td bgcolor=white> 0</td>
+            <td bgcolor=white> 1</td>
+        </tr>
+        <tr>
+            <th bgcolor=white>Processing:</th>
+            <td bgcolor=white> 0</td>
+            <td bgcolor=white> 0</td>
+            <td bgcolor=white> 0</td>
+        </tr>
+        <tr>
+            <th bgcolor=white>Total:</th>
+            <td bgcolor=white> 0</td>
+            <td bgcolor=white> 0</td>
+            <td bgcolor=white> 1</td>
+        </tr>
+    </table>
+
+
+
+</body>
+
+</html>
\ No newline at end of file
diff --git a/quality/http-server-test/go.mod b/quality/http-server-test/go.mod
new file mode 100644
index 0000000..6f92eda
--- /dev/null
+++ b/quality/http-server-test/go.mod
@@ -0,0 +1,3 @@
+module golang.source-fellows.com/samples/http-server-test
+
+go 1.14
diff --git a/quality/http-server-test/main.go b/quality/http-server-test/main.go
new file mode 100644
index 0000000..04e3750
--- /dev/null
+++ b/quality/http-server-test/main.go
@@ -0,0 +1,29 @@
+package main
+
+import (
+	"net/http"
+)
+
+var jsonDoc1 = []byte("{\"Name\":\"")
+var jsonDoc2 = []byte("\"}")
+
+func myHandler(writer http.ResponseWriter, req *http.Request) {
+	path := req.URL.Path
+
+	if len(path) < 6 || path[:6] != "/json/" {
+		writer.WriteHeader(http.StatusNotImplemented)
+		return
+	}
+
+	writer.Header().Add("Content-Type", "application/json")
+	bites := make([]byte, 20)
+	bites = append(bites, jsonDoc1...)
+	bites = append(bites, path[6:]...)
+	bites = append(bites, jsonDoc2...)
+	writer.Write(bites)
+}
+
+func main() {
+	http.HandleFunc("/", myHandler)
+	http.ListenAndServe(":8080", nil)
+}
diff --git a/quality/http-server-test/main_test.go b/quality/http-server-test/main_test.go
new file mode 100644
index 0000000..8dd6bb6
--- /dev/null
+++ b/quality/http-server-test/main_test.go
@@ -0,0 +1,40 @@
+package main
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+)
+
+func Test_myHandler(t *testing.T) {
+	type args struct {
+		url          string
+		expectedName string
+		status       int
+	}
+	tests := []struct {
+		name string
+		args args
+	}{
+		{"t1", args{"/json/test", "test", http.StatusOK}},
+		{"t2", args{"/x/y", "", http.StatusNotImplemented}},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			url := tt.args.url
+			req, err := http.NewRequest(http.MethodGet, url, nil)
+			if err != nil {
+				t.Errorf("could't create request: %v", tt.args.url)
+			}
+			recorder := httptest.NewRecorder()
+			myHandler(recorder, req)
+			if recorder.Result().StatusCode != tt.args.status {
+				t.Errorf("Wrong status code %v, expected %v", recorder.Result().StatusCode, tt.args.status)
+			}
+			if !strings.Contains(recorder.Body.String(), tt.args.expectedName) {
+				t.Errorf("The response does't contain '%v': '%v'", tt.args.expectedName, recorder.Body.String())
+			}
+		})
+	}
+}
diff --git a/quality/unittest/cmd/main.go b/quality/unittest/cmd/main.go
new file mode 100644
index 0000000..7291fae
--- /dev/null
+++ b/quality/unittest/cmd/main.go
@@ -0,0 +1,12 @@
+package main
+
+import (
+	"fmt"
+
+	"golang.source-fellows.com/samples/unittest/math"
+)
+
+func main() {
+	res := math.Add(1, 2)
+	fmt.Printf("Das Ergbnis ist %v", res)
+}
diff --git a/quality/unittest/go.mod b/quality/unittest/go.mod
new file mode 100644
index 0000000..482b140
--- /dev/null
+++ b/quality/unittest/go.mod
@@ -0,0 +1,3 @@
+module golang.source-fellows.com/samples/unittest
+
+go 1.13
diff --git a/quality/unittest/math/add.go b/quality/unittest/math/add.go
new file mode 100644
index 0000000..5620082
--- /dev/null
+++ b/quality/unittest/math/add.go
@@ -0,0 +1,6 @@
+package math
+
+// Add adds two integer values.
+func Add(a int, b int) int {
+	return a + b
+}
diff --git a/quality/unittest/math/add_test.go b/quality/unittest/math/add_test.go
new file mode 100644
index 0000000..753a811
--- /dev/null
+++ b/quality/unittest/math/add_test.go
@@ -0,0 +1,42 @@
+package math_test
+
+import (
+	"testing"
+	"time"
+
+	"golang.source-fellows.com/samples/unittest/math"
+)
+
+func TestAdd(t *testing.T) {
+	res := math.Add(1, 2)
+	if res != 3 {
+		t.Fatalf("Not the expected result %v", res)
+	}
+
+}
+
+var testdata = []struct {
+	name   string
+	param1 int
+	param2 int
+	result int
+}{
+	{"positiv1", 1, 2, 3},
+	{"positiv2", 2, 3, 5},
+	{"negativ1", -2, 3, 5}, //stimmt nicht! - zur Demo von Testfehlern
+	{"negativ2", 2, -3, 7}, //stimmt nicht! - zur Demo von Testfehlern
+}
+
+func TestTableAdd(t *testing.T) {
+	for _, tt := range testdata {
+		t.Run(tt.name, func(t *testing.T) {
+			tt := tt
+			t.Parallel()
+			result := math.Add(tt.param1, tt.param2)
+			time.Sleep(time.Second * 1)
+			if result != tt.result {
+				t.Errorf("%v not expected. Expected: %v", result, tt.result)
+			}
+		})
+	}
+}
diff --git a/somelib/LICENSE b/somelib/LICENSE
new file mode 100644
index 0000000..261eeb9
--- /dev/null
+++ b/somelib/LICENSE
@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
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+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
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+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
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+      Work (including but not limited to damages for loss of goodwill,
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+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
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+      the Work or Derivative Works thereof, You may choose to offer,
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+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
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+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/somelib/README.md b/somelib/README.md
new file mode 100644
index 0000000..cd66284
--- /dev/null
+++ b/somelib/README.md
@@ -0,0 +1,19 @@
+Sample Golang Project - Version 2
+---------------------------------
+
+This is a simple Golang library in version 2 to show how to import a library to other projects.
+
+You can use the library for example in our own application like this:
+```
+package main
+
+import somelib "github.com/sourcefellows/somelib/v2"
+
+func main() {
+
+	somelib.CallLibV2()
+
+}
+```
+
+visit: https://www.source-fellows.com
\ No newline at end of file
diff --git a/somelib/go.mod b/somelib/go.mod
new file mode 100644
index 0000000..da0c48c
--- /dev/null
+++ b/somelib/go.mod
@@ -0,0 +1,3 @@
+module github.com/SourceFellows/somelib
+
+go 1.14
diff --git a/somelib/somelib.go b/somelib/somelib.go
new file mode 100644
index 0000000..7e1e13f
--- /dev/null
+++ b/somelib/somelib.go
@@ -0,0 +1,9 @@
+// Package somelib shows how to build a simple golang library.
+package somelib
+
+import "fmt"
+
+// CallLib simple writes a string to the console.
+func CallLib() {
+	fmt.Println("Here is somelib - version 1.0.0")
+}
diff --git a/somelib/v2/go.mod b/somelib/v2/go.mod
new file mode 100644
index 0000000..1a457c4
--- /dev/null
+++ b/somelib/v2/go.mod
@@ -0,0 +1,3 @@
+module github.com/SourceFellows/somelib/v2
+
+go 1.14
diff --git a/somelib/v2/somelib.go b/somelib/v2/somelib.go
new file mode 100644
index 0000000..eaa4f14
--- /dev/null
+++ b/somelib/v2/somelib.go
@@ -0,0 +1,9 @@
+// Package somelib shows how to build a simple golang library.
+package somelib
+
+import "fmt"
+
+// CallLibV2 simple writes a string to the console.
+func CallLibV2() {
+	fmt.Println("Here is somelib - version 2.0.0")
+}
diff --git a/vscode-first/go.mod b/vscode-first/go.mod
new file mode 100644
index 0000000..6075c3e
--- /dev/null
+++ b/vscode-first/go.mod
@@ -0,0 +1,5 @@
+module source-fellows.com/first-vscode
+
+go 1.13
+
+require github.com/sirupsen/logrus v1.4.2
diff --git a/vscode-first/go.sum b/vscode-first/go.sum
new file mode 100644
index 0000000..2deed80
--- /dev/null
+++ b/vscode-first/go.sum
@@ -0,0 +1,25 @@
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/konsorten/go-windows-terminal-sequences v1.0.1 h1:mweAR1A6xJ3oS2pRaGiHgQ4OO8tzTaLawm8vnODuwDk=
+github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/sirupsen/logrus v1.2.0 h1:juTguoYk5qI21pwyTXY3B3Y5cOTH3ZUyZCg1v/mihuo=
+github.com/sirupsen/logrus v1.2.0/go.mod h1:LxeOpSwHxABJmUn/MG1IvRgCAasNZTLOkJPxbbu5VWo=
+github.com/sirupsen/logrus v1.3.0 h1:hI/7Q+DtNZ2kINb6qt/lS+IyXnHQe9e90POfeewL/ME=
+github.com/sirupsen/logrus v1.3.0/go.mod h1:LxeOpSwHxABJmUn/MG1IvRgCAasNZTLOkJPxbbu5VWo=
+github.com/sirupsen/logrus v1.4.0 h1:yKenngtzGh+cUSSh6GWbxW2abRqhYUSR/t/6+2QqNvE=
+github.com/sirupsen/logrus v1.4.0/go.mod h1:LxeOpSwHxABJmUn/MG1IvRgCAasNZTLOkJPxbbu5VWo=
+github.com/sirupsen/logrus v1.4.1 h1:GL2rEmy6nsikmW0r8opw9JIRScdMF5hA8cOYLH7In1k=
+github.com/sirupsen/logrus v1.4.1/go.mod h1:ni0Sbl8bgC9z8RoU9G6nDWqqs/fq4eDPysMBDgk/93Q=
+github.com/sirupsen/logrus v1.4.2 h1:SPIRibHv4MatM3XXNO2BJeFLZwZ2LvZgfQ5+UNI2im4=
+github.com/sirupsen/logrus v1.4.2/go.mod h1:tLMulIdttU9McNUspp0xgXVQah82FyeX6MwdIuYE2rE=
+github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.2.2 h1:bSDNvY7ZPG5RlJ8otE/7V6gMiyenm9RtJ7IUVIAoJ1w=
+github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
+golang.org/x/crypto v0.0.0-20180904163835-0709b304e793 h1:u+LnwYTOOW7Ukr/fppxEb1Nwz0AtPflrblfvUudpo+I=
+golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
+golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33 h1:I6FyU15t786LL7oL/hn43zqTuEGr4PN7F4XJ1p4E3Y8=
+golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20190422165155-953cdadca894 h1:Cz4ceDQGXuKRnVBDTS23GTn/pU5OE2C0WrNTOYK1Uuc=
+golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
diff --git a/vscode-first/main.go b/vscode-first/main.go
new file mode 100644
index 0000000..2a7f174
--- /dev/null
+++ b/vscode-first/main.go
@@ -0,0 +1,7 @@
+package main
+
+import log "github.com/sirupsen/logrus"
+
+func main() {
+	log.Println("Hello World")
+}