Add GA for build/push to GHCR

.github/workflows/main.yml

@@ -0,0 +1,46 @@
+name: Build and publish container
+
+on:
+  push:
+    branches: [master]
+  workflow_dispatch:
+    inputs:
+      reason:
+        description: 'Why ?'
+        required: false
+        default: ''
+
+jobs:
+  ghr_push:
+    runs-on: ubuntu-latest
+    if: github.event_name == 'push'
+
+    steps:
+      - name: checkout
+        uses: actions/checkout@v2
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: Log-in to ghcr.io
+        run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login https://ghcr.io -u ${{ github.actor }} --password-stdin
+
+      - name: Build and push container image
+        run: |
+          IMAGE_ID=$(echo ghcr.io/${{ github.repository }} | tr '[A-Z]' '[a-z]')
+          # Strip git ref prefix from version
+          VERSION=$(echo "${{ github.ref }}" | sed -e 's,.*/\(.*\),\1,')
+          # Strip "v" prefix from tag name
+          [[ "${{ github.ref }}" == "refs/tags/"* ]] && VERSION=$(echo $VERSION | sed -e 's/^v//')
+          # when the branch is master, replace master with latest
+          [ "$VERSION" == "master" ] && VERSION=latest
+          echo IMAGE_ID=$IMAGE_ID
+          echo VERSION=$VERSION
+          # Build and Publish container image
+          docker buildx build --push \
+          --tag $IMAGE_ID:$VERSION \
+          --platform linux/amd64,linux/arm64 .

Dockerfile

@@ -1,22 +1,13 @@
 FROM alpine:latest
 
-ARG APPLICATION="myapp"
+ARG APPLICATION="autossh"
 ARG BUILD_RFC3339="1970-01-01T00:00:00Z"
 ARG REVISION="local"
 ARG DESCRIPTION="no description"
 ARG PACKAGE="user/repo"
 ARG VERSION="dirty"
 
-LABEL org.opencontainers.image.ref.name="${PACKAGE}" \
-  org.opencontainers.image.created=$BUILD_RFC3339 \
-  org.opencontainers.image.authors="Justin J. Novack <[email protected]>" \
-  org.opencontainers.image.documentation="https://github.com/${PACKAGE}/README.md" \
-  org.opencontainers.image.description="${DESCRIPTION}" \
-  org.opencontainers.image.licenses="MIT" \
-  org.opencontainers.image.source="https://github.com/${PACKAGE}" \
-  org.opencontainers.image.revision=$REVISION \
-  org.opencontainers.image.version=$VERSION \
-  org.opencontainers.image.url="https://hub.docker.com/r/${PACKAGE}/"
+LABEL org.opencontainers.image.source="https://github.com/Q24/autossh"
 
 RUN \
   apk --no-cache add \