Minor Description
The Docker runtime isolator propagates manifest configuration metadata. This is not always desirable, e.g. a customer may want to ignore the defined WORKDIR/ENV defined in the manifest.
We propose adding a flag `–docker_ignore_manifest_config` to decouple the choice of Docker as an image provider and the need for the Docker runtime isolator. In the background, this flag will conditionally ignore the work of the Docker runtime isolator.