push to ghcr.io registry

e.g. https://docs.github.com/en/packages/managing-github-packages-using-github-actions-workflows/publishing-and-installing-a-package-with-github-actions

.github/workflows/build_docker_image.yml

@@ -8,6 +8,10 @@ on:
     branches:
       - "*"
 
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
 jobs:
   build:
     name: build ((${{ matrix.platform}})
@@ -29,13 +33,18 @@ jobs:
         uses: docker/setup-qemu-action@v3
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
-      - name: Login to Github packages
+      - name: Login to the container registry
         if: github.event_name != 'pull_request'
         uses: docker/login-action@v3
         with:
-          registry: ghcr.io
+          registry: ${{ env.REGISTRY }}
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
       - name: Build and push Docker image
         uses: docker/build-push-action@v5
         with:
@@ -44,4 +53,5 @@ jobs:
           push: ${{ github.event_name != 'pull_request' }}
           build-args: |
               ARCH=${{ matrix.platform }}
-          tags: ${{ github.repository }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}