Container: New GitHub workflow to build and publish containers

.github/workflows/container.yml

@@ -0,0 +1,69 @@
+name: Container
+
+on:
+  push:
+    paths-ignore:
+    - '.devcontainer/**'
+    - 'examples/**'
+    - 'lib/**'
+    - 'man/**'
+    - 'priv/**'
+    - '**.md'
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  container:
+    name: Container
+    runs-on: ubuntu-20.04
+    permissions:
+      packages: write
+    steps:
+
+      - name: Check out repository code
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@v1.14.1
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Get git describe
+        id: gitdescribe
+        run: echo "::set-output name=ver::$(git describe --tags)"
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v3.8.0
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          labels: |
+            org.opencontainers.image.revision=${{ steps.gitdescribe.outputs.ver }}
+            org.opencontainers.image.licenses=GPL-2.0
+            org.opencontainers.image.vendor=ProcessOne
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v2.10.0
+        with:
+          build-args: |
+            VERSION=${{ steps.gitdescribe.outputs.ver }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+          context: .github/container
+          labels: ${{ steps.meta.outputs.labels }}
+          #platforms: linux/amd64,linux/arm64 # arm takes 30 mins to compile
+          platforms: linux/amd64
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}