feat: Confirm before exiting docker container

[gregjacobus]

Confirm before exiting docker container

Description

In the current version of the docker container, it's very easy to accidentally lose all experiment progress by closing the final tmux pane. This PR changes it so that when the tmux session ends, the user is prompted if they really want to exit the docker container. If they don't choose "yes", it will create a new tmux session.

Related Issue

N/A

Type of Change

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• Bugfix
• New feature
• Documentation update
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Checklist

• This PR conforms to the process detailed in the Contributing Guide.
• I have included no proprietary/sensitive information in my code.
• I have performed a self-review of my code.
• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.
• I have tested my code.

[sdelliot]

Maybe something a bit more clear? "Exit and shutdown container? (yes/no); " or "Exit and kill container (yes/no); " or "Are you sure you want to end your experiment because the container is dying and you can't get it back (yes/no)"