SELinux permissions errors in container provisioner

[C-512L]

Using containers which read any mounted volume fails if SELinux is in enforcing mode.
This could be fixed by using the Z flag for container volumes but it may not be the perfect solution since it relabels the SELinux files/directories of the workspace. This is supported by both docker and podman. Another option could be disabling labels entirely using --security-opt label=disable, which is something other tools which wrap around a container engine like distrobox do.

[JoelColledge]

Sounds reasonable. I'm not aware that any of the contributors to this project so far use SELinux. So someone else will have to step in. Patches welcome!