Can't get file from cp filed in docker run -v <path>:/mount <image> bash -c "cp file /mount"

When I run `docker run -v :/mount bash -c "cp foo /mount"`

I can't see the copied file in the run of the codebuild locally.
This works, though, in the AWS cloud.

Start by reproducing the exact `docker run -v :/mount bash -c "cp foo /mount"` command in the local CodeBuild environment and check whether the mounted host path contains the copied file. Compare that result with the AWS cloud behavior; done means the file is visible in the local host path as well.

Written by the indexing model from the issue text.