Use same context for build and publish steps

Author: tpoliaw

.github/workflows/_container.yml

@@ -54,6 +54,7 @@ jobs:
         env:
           DOCKER_BUILD_RECORD_UPLOAD: false
         with:
+          context: .
           push: ${{ github.event_name == 'push' && github.ref_type == 'tag' }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}