Merge pull request #8 from stackhpc/only-tag-latest-on-master-releases

only attach tag 'latest' on master releases

Author: jovial

.github/workflows/build-and-push-images.yml

@@ -37,11 +37,14 @@ jobs:
         uses: docker/metadata-action@v4
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            # set latest tag for master branch
+            type=raw,value=latest,enable=${{ github.ref == format('refs/heads/{0}', 'master') }}
 
       - name: Build and push Docker image
         uses: docker/build-push-action@v4
         with:
           context: .
           push: ${{ github.event_name != 'pull_request' }}
           tags: ${{ steps.meta.outputs.tags }}
-          labels: ${{ steps.meta.outputs.labels }}
+          labels: ${{ steps.meta.outputs.labels }}