Package step should have consistent environment

[Eeems]

There is no current way to ensure that the system has the same commands available, so that it will work no matter which host it's run on. Some sort of consistent environment should be used (debian base image?) to have some sort of consistent set of tools available.

This will require sorting out how to ensure that the user/group used is consistent with the host. One way to do this would be to move most of the toltecmk logic to running in the same container, and the host system not actually acting on any files outside of spinning up containers to run.

[Eeems]

Related #13