Add support for Docker images from repo tags

.github/workflows/ci.yml

@@ -4,6 +4,8 @@ on:
   push:
     branches:
       - 'master'
+    tags:
+      - "*"
 
 jobs:
   docker:
@@ -24,10 +26,20 @@ jobs:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ secrets.DOCKERHUB_USERNAME }}/zoffline
+          tags: |
+            type=ref,event=tag
+            type=raw,value=latest,enable={{is_default_branch}}
+
       - name: Build and push
-        uses: docker/build-push-action@v2
+        uses: docker/build-push-action@v5
         with:
           context: .
+          labels: ${{ steps.meta.outputs.labels }}
           platforms: linux/amd64,linux/arm64
-          push: ${{ github.event_name != 'pull_request' }}
-          tags: ${{ secrets.DOCKERHUB_USERNAME }}/zoffline:latest
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}