Update build_tag.yml

Author: Arne1303

.github/workflows/build_tag.yml

@@ -23,11 +23,17 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
+      - name: Metadata
+        id: meta
+        uses: docker/metadata-action@98669ae865ea3cffbcbaa878cf57c20bbf1c6c38
+        with:
+          images: ghcr.io/${{ github.repository }}
+
       - name: Build and push
         id: docker_build
         uses: docker/build-push-action@ad44023a93711e3deb337508980b4b5e9bcdc5dc
         with:
           context: src
           push: true
-          tags: ${{ env.GITHUB_REF }}
-          labels: ${{ env.GITHUB_REF }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}