docker-push workflow: updated the Dockerfile context to build/Dockerfile

Author: choxx

.github/workflows/docker-push.yml

@@ -37,8 +37,9 @@ jobs:
         uses: docker/build-push-action@v2
         with:
           context: .
+          file: ./build/Dockerfile
           push: true
           tags: ${{ steps.meta.outputs.tags }}
 
       - name: Image digest
-        run: echo ${{ steps.docker_build.outputs.digest }}
+        run: echo ${{ steps.docker_build.outputs.digest }}