[EASI-4129] nginx CEDAR Caching

[mynar7]

EASI-4129, EASI-4130

Changes and Description

• Implements nginx as a proxy between EASi and CEDAR that caches all GET requests.
• Implements a community module for nginx that allows for cache invalidation by sending an HTTP PURGE request to any cached endpoint's URL.

How to test this change

Connect to the CMS VPN, start the app using docker-compose as normal, and make sure to set .envrc.local to allow connecting to CEDAR. Requests should cache automatically. Adding/removing users/roles to systems has cache invalidation applied as an example.

PR Author Review Checklist

• Met the ticket's acceptance criteria, or will meet them in a subsequent PR.
• Added or updated tests for backend resolvers or other functions as needed.
• Added or updated client tests for new components, parent components, functions, or e2e tests as necessary.
• Tested user-facing changes with voice-over and the rotor menu

PR Reviewer Guidelines

• It's best to pull the branch locally and test it, rather than just looking at the code online!
• Check that all code is adequately covered by tests - if it isn't feel free to suggest the addition of tests.
• Always make comments, even if it's minor, or if you don't understand why something was done.

[samoddball]

🔥 !!! 💰 (cache)

[Jdwoodson]