Test image with explicit tag

Author: zemanlx

.github/workflows/docker-publish.yml

@@ -18,6 +18,7 @@ env:
   REGISTRY: ghcr.io
   # github.repository as <account>/<repo>
   IMAGE_NAME: ${{ github.repository }}
+  TEST_TAG: ${{ github.repository }}:test
 
 jobs:
   build:
@@ -67,14 +68,13 @@ jobs:
         with:
           context: .
           load: true
-          tags: ${{ steps.meta.outputs.tags }}
-          labels: ${{ steps.meta.outputs.labels }}
+          tags: ${{ env.TEST_TAG }}
 
       # Test Docker image
       - name: Run tests of Docker image
         id: test-docker-image
         run: |
-          docker run --rm -i -v $PWD:/lint/input:ro ${{ steps.meta.outputs.tags }} --frail .
+          docker run --rm -i -v $PWD:/lint/input:ro ${{ env.TEST_TAG }} --frail .
 
       # Build and push Docker image with Buildx (don't push on PR)
       # https://github.com/docker/build-push-action