wishlist: expose the container's name in the environment

[gkiagia]

It would be nice to be able to access the container's name (the one from toolbox create -c <name>) from the environment within the container. It's useful to display it in a custom shell prompt, so that it's easy to tell in which container you are working in...

The distribution's name / version is not enough. I tend to create multiple toolbox containers based on the same image, installing different packages in each, while working on different projects.

[HarryMichal]

Hi @gkiagia! This is a duplicate of #98.