DOCKER_TAG as single string

.github/workflows/osrm-backend-docker.yml

@@ -3,8 +3,6 @@ on:
   push:
     tags:
       - 'v*'
-    branches:
-      - master      
 
 jobs:
   publish:
@@ -18,13 +16,13 @@ jobs:
         id: meta
         uses: docker/metadata-action@v3
         with:
-          images: ghcr.io/${{ github.repository }}/osrm-backend
+          images: ghcr.io/${{ github.repository }}
 
       - name: Docker meta - debug
         id: metadebug
         uses: docker/metadata-action@v3
         with:
-          images: ghcr.io/${{ github.repository }}/osrm-backend          
+          images: ghcr.io/${{ github.repository }}
           flavor: |
             latest=true
             suffix=-debug,onlatest=true
@@ -33,7 +31,7 @@ jobs:
         id: metaassertions
         uses: docker/metadata-action@v3
         with:
-          images: ghcr.io/${{ github.repository }}/osrm-backend          
+          images: ghcr.io/${{ github.repository }}
           flavor: |
             latest=true
             suffix=-assertions,onlatest=true
@@ -58,7 +56,7 @@ jobs:
           file: ./docker/Dockerfile
           tags:  ${{ steps.meta.outputs.labels }}
           build-args: 
-          - DOCKER_TAG:  ${{ steps.meta.outputs.labels }}
+          - DOCKER_TAG: ${{ join(steps.metaassertions.outputs.labels }}
 
 
       - name: Build container image - debug
@@ -68,7 +66,7 @@ jobs:
           file: ./docker/Dockerfile
           tags: ${{ steps.metadebug.outputs.labels }}
           build-args:     
-          - DOCKER_TAG: ${{ steps.metadebug.outputs.labels }}
+          - DOCKER_TAG: ${{ join(steps.metaassertions.outputs.labels }}
 
 
       - name: Build container image - assertions
@@ -78,7 +76,7 @@ jobs:
           file: ./docker/Dockerfile
           tags: ${{ steps.metaassertions.outputs.labels }}
           build-args:     
-          - DOCKER_TAG: ${{ steps.metaassertions.outputs.labels }}
+          - DOCKER_TAG: ${{ join(steps.metaassertions.outputs.labels }}