feat: update Makefile, renovate, gitlangci-lint, markdownlint, container-image

Dockerfile

@@ -1,31 +1,28 @@
-ARG BASE_IMAGE
-ARG BUILD_IMAGE
+FROM docker.io/library/golang:1.21.6-alpine3.18 as build
 
-# BUILD
-# =====================================================================
-FROM ${BUILD_IMAGE} AS build
-
-ARG GONOPROXY
-ARG GONOSUMDB
-ARG GOPRIVATE
-ARG GOPROXY
-ARG GOSUMDB
 ARG VERSION
 
 COPY ./ /workspace
 
-RUN cd /workspace && \
-    GONOPROXY=${GONOPROXY} \
-    GONOSUMDB=${GONOSUMDB} \
-    GOPRIVATE=${GOPRIVATE} \
-    GOPROXY=${GOPROXY} \
-    GOSUMDB=${GOSUMDB} \
-    VERSION=${VERSION} \
-      make all
+WORKDIR /workspace
+
+RUN set -ex && \
+    apk update && \
+    apk add git make && \
+    make all VERSION=${VERSION}
 
 # TARGET
 # =====================================================================
-FROM ${BASE_IMAGE}
+FROM docker.io/library/alpine:3.19
+
+ARG VERSION=latest
+
+LABEL org.opencontainers.image.authors="Markus Pesch" \
+      org.opencontainers.image.description="Return the ip address of the router to forward traffic to an external ip address" \
+      org.opencontainers.image.documentation="https://git.cryptic.systems/volker.raschek/getpsrc#getpsrc" \
+      org.opencontainers.image.title="getpsrc" \
+      org.opencontainers.image.vendor="Markus Pesch" \
+      org.opencontainers.image.version="${VERSION}"
 
 COPY --from=build /workspace/getpsrc /usr/bin/getpsrc