Document process of setting up web app VM (Jetstream2)

[eecavanna]

Example content:

• Shell script to set up the VM from its freshly-created state (install Docker and ufw firewall?, create users/groups)
• Shell script for setting up the firewall on the VM

Docs location: https://github.com/microbiomedata/nmdc-edge/tree/main/docs (alongside the "production" Docker Compose file)

[eecavanna]

Closing this ticket in favor of https://github.com/microbiomedata/nmdc-edge/issues/240 (lots of overlap).

[eecavanna]

Done via https://github.com/microbiomedata/nmdc-edge/issues/240