- Restyled warning text for emphasis
- Moved the mention of container images to the intro

Clarify storage recommendations; revised instructions for improved readability; small punctuation and phrasing changes

the login node.

connection. (step 4)

latest version of master.

- added setup section
- moved SSH port forwarding after the example job script
- Replaced pointer to Jupyter Notebooks with a sentence on interactive jobs.

- adjusted headings
- enclosed storage notes in a note box
- changed <> to {} to workaround an encoding bug
- added explanation of `sbatch` and `srun`

- manually sort the software guides for now to effectively pin the
  environment modules and virtual environment guides to the top