Switch back to single yml for contaienrs, import Mg version

In the Mg project I went a little nuts trying out various combinations
of how to annotate images with metadata.  But the real spin-off from
that project was support for multi-arch images using the standard docker
actions, with support for both Docker Hub and GHCR.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

.github/workflows/container.yml

@@ -0,0 +1,111 @@
+name: Container Claus
+
+on:
+  push:
+    branches:
+      - 'master'
+    tags:
+      - 'v*'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      packages: write
+      contents: read
+    env:
+      MAKEFLAGS: -j3
+    strategy:
+      fail-fast: false
+      matrix:
+        platform:
+          - linux/amd64
+          - linux/arm/v6
+          - linux/arm/v7
+          - linux/arm64
+          - linux/ppc64le
+    steps:
+      - uses: actions/checkout@v3
+      - uses: docker/metadata-action@v4
+        id: meta
+        with:
+          images: |
+            ${{ github.repository }}
+          labels: |
+            org.opencontainers.image.source=https://github.com/troglobit/inadyn/tree/${{ github.sha }}/
+      - uses: docker/setup-qemu-action@v2
+      - uses: docker/setup-buildx-action@v2
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      - uses: docker/build-push-action@v4
+        id: build
+        with:
+          context: .
+          labels: ${{ steps.meta.outputs.labels }}
+          platforms: ${{ matrix.platform }}
+          outputs: >-
+            type=image,
+            name=${{ github.repository }},
+            name-canonical=true,
+            push-by-digest=true,
+            push=true,
+            annotation-index.org.opencontainers.image.title=In-a-Dyn,
+            annotation-index.org.opencontainers.image.description=A dynamic DNS (DDNS) client with multiple SSL/TLS library support,
+            annotation-index.org.opencontainers.image.url=https://github.com/troglobit/inadyn,
+            annotation-index.org.opencontainers.image.licenses=GPL-2.0,
+            annotation-index.org.opencontainers.image.revision=${{ github.sha }}
+      - name: Export digest
+        run: |
+          mkdir -p /tmp/digests
+          digest="${{ steps.build.outputs.digest }}"
+          touch "/tmp/digests/${digest#sha256:}"
+      - name: Upload digest
+        uses: actions/upload-artifact@v3
+        with:
+          name: digests
+          path: /tmp/digests/*
+          if-no-files-found: error
+          retention-days: 1
+  merge:
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - name: Download digests
+        uses: actions/download-artifact@v3
+        with:
+          name: digests
+          path: /tmp/digests
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v4
+        with:
+          images: |
+            ${{ github.repository }}
+            ghcr.io/${{ github.repository }}
+          tags: |
+            type=ref,event=tag
+            type=edge
+      - name: Log in to GHCR
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Login to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      - name: Create manifest list and push
+        working-directory: /tmp/digests
+        run: |
+          docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
+            $(printf '${{ github.repository }}@sha256:%s ' *)
+      - name: Inspect image
+        run: |
+          docker buildx imagetools inspect ${{ github.repository }}:${{ steps.meta.outputs.version }}

Dockerfile

@@ -22,8 +22,6 @@ LABEL org.opencontainers.image.title="In-a-Dyn"
 LABEL org.opencontainers.image.description="A dynamic DNS (DDNS) client with multiple SSL/TLS library support"
 LABEL org.opencontainers.image.url="https://github.com/troglobit/inadyn"
 LABEL org.opencontainers.image.licenses="GPL-2.0"
-LABEL org.opencontainers.image.revision="$revision"
-LABEL org.opencontainers.image.source="https://github.com/troglobit/inadyn/tree/${revision:-master}/"
 
 RUN apk --update --no-cache add \
   ca-certificates \