Container slashRoot convention

The entrypoint script for the container should look in a particular directory like /opt/slashRoot for a layout of files to then overlay into the running container, so that a deployer can provide a single mount as a directory that then includes a set of files with localized deployment configurations.

This would work very similarly to the way the Grouper container works.

This approach would be especially helpful for orchestration systems where mounting specific files is not as easy or manageable.