Using the pytorch notebook as a base for the llm notebook.
Created an empty .sh file for adding installation script

Docerfile includes steps for copying and running the script.
Script renamed to make it clear what dependencies are being installed

The original directory was being hidden on JupyterHub by Longhorn,
moving it to a different location to download the model

Add model download steps to a RW directory, and add an env var to point
to this by default