Two-way sync

Syncing in Skaffold to the container works well. However, applications sometimes change files on the filesystem themselves. If this happens inside the container, it is hard to get that change quickly during development.

There might be two types of file changes:
1) inside the code repository, e.g. under the project files in an IDE
2) outside of the code repo, e.g. in /var/log/, or somewhere else

Mounting directories is tricky and slow, also can collide with Skaffold's one directional filesync.
Maybe Skaffold should be able to help with syncing back from the container in dev mode.

I would like to collect feedback from users who face this and see what use cases are there.