added 1909 dockerfile

.drone.yml

@@ -99,6 +99,38 @@ steps:
     - push
     - tag
 
+---
+kind: pipeline
+type: ssh
+name: windows-1909-amd64
+
+platform:
+  os: windows
+
+server:
+  host:
+    from_secret: windows_server_1909
+  password:
+    from_secret: windows_password
+  user:
+    from_secret: windows_username
+
+steps:
+- name: build
+  commands:
+  - docker login -u $env:USERNAME -p $env:PASSWORD
+  - docker build -f docker/Dockerfile.windows.1909 -t drone/git:windows-1909-amd64 .
+  - docker push drone/git:windows-1909-amd64
+  environment:
+    USERNAME:
+      from_secret: docker_username
+    PASSWORD:
+      from_secret: docker_password
+
+trigger:
+  event:
+  - push
+
 ---
 kind: pipeline
 type: ssh
@@ -189,5 +221,6 @@ depends_on:
 - linux-amd64
 - linux-arm64
 - linux-arm
+- windows-1909-amd64
 - windows-1903-amd64
 - windows-1809-amd64

docker/Dockerfile.windows.1909

@@ -0,0 +1,20 @@
+# escape=`
+
+FROM mcr.microsoft.com/windows/servercore:1909 AS git
+SHELL ["powershell.exe", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]
+
+RUN [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12 ; `
+    Invoke-WebRequest -UseBasicParsing https://github.com/git-for-windows/git/releases/download/v2.21.0.windows.1/MinGit-2.21.0-64-bit.zip -OutFile git.zip; `
+    Expand-Archive git.zip -DestinationPath C:\git;
+
+FROM mcr.microsoft.com/powershell:nanoserver-1909
+COPY --from=git /git /git
+
+ADD windows/* /bin/
+
+# https://github.com/PowerShell/PowerShell/issues/6211#issuecomment-367477137
+USER ContainerAdministrator
+RUN setx /M PATH "%PATH%;C:\Program Files\PowerShell"
+
+SHELL ["pwsh", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]
+CMD [ "pwsh", "C:\\bin\\clone.ps1" ]