[CI] Fix release Docker github action (#1942)

polkadot/.github/workflows/publish-docker-release.yml

@@ -14,12 +14,12 @@ jobs:
         uses: docker/setup-buildx-action@v1
       - name: Cache Docker layers
         uses: actions/cache@v2
-      - name: Login to Dockerhub
         with:
          path: /tmp/.buildx-cache
          key: ${{ runner.os }}-buildx-${{ github.sha }}
          restore-keys: |
            ${{ runner.os }}-buildx-
+      - name: Login to Dockerhub
         uses: docker/login-action@v1
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
@@ -29,10 +29,14 @@ jobs:
         uses: docker/build-push-action@v2
         with:
           push: true
-          file: scripts/docker/Dockerfile.release
+          file: scripts/docker/release.Dockerfile
           tags: |
             parity/polkadot:latest
             parity/polkadot:${{ github.event.release.tag_name }}
+          build-args: |
+            POLKADOT_VERSION=${{ github.event.release.tag_name }}
+            VCS_REF=${{ github.ref }}
+            BUILD_DATE=${{ github.event.release.published_at }}
           cache-from: type=local,src=/tmp/.buildx-cache
           cache-to: type=local,dest=/tmp/.buildx-cache
       - name: Image digest