Improve build

.github/workflows/base_tumbleweed_devbox.yml

@@ -6,6 +6,12 @@ on:
     paths:
       - distroboxes/TumbleweedL1emacs
 
+env:
+  # Use docker.io for Docker Hub if empty
+  REGISTRY: ghcr.io
+  # github.repository as <account>/<repo>
+  IMAGE_NAME: ${{ github.repository }}
+
 jobs:
   build-and-publish:
     runs-on: ubuntu-latest
@@ -23,15 +29,23 @@ jobs:
     - name: Log in to GitHub Container Registry
       uses: docker/login-action@v3
       with:
-        registry: ghcr.io
+        registry: ${{ env.REGISTRY }}
         username: ${{ github.actor }}
         password: ${{ secrets.GITHUB_TOKEN }}
-
+
+    # Extract metadata (tags, labels) for Docker
+    # https://github.com/docker/metadata-action
+    - name: Extract Docker metadata
+      id: meta
+      uses: docker/metadata-action@98669ae865ea3cffbcbaa878cf57c20bbf1c6c38
+      with:
+        images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
     - name: Build and push Docker image
       uses: docker/build-push-action@v5
       with:
         context: "{{defaultContext}}:distroboxes"
         file: TumbleweedL1emacs
         push: true
-        tags: ${{ github.repository_owner }}/${{ github.event.repository.name }}:latest
-
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}