nginx recursive content routing for non-production environments

[bjester]

Summary

• Refactors nginx configuration and image to avoid templating, and instead perform a hotswap of configuration files
• Implements nginx configuration for non-production environments which recursively checks multiple locations for requests to the /content reverse proxy
• Updates storage emulator and uses embedded bucket creation controlled through docker-compose.yml
• Adds licensing mention to README considering storage emulator cannot and should not be distributed with Studio-- they have conflicting licenses

Value add

• This allows us to empty Studio's non-production storage bucket (develop-studio-content) every time we restore a database. Furthermore, this saves us a ton money because we no longer have to replicate storage files from the production bucket.

References

Discussion https://learningequality.slack.com/archives/C0WHZ9FPX/p1733344134300819

Reviewer guidance

1. Modify your /etc/hosts and set minio to resolve to your machine (this is an unaddressed caveat with running everything through docker-- the internal API needs to use the docker network hostname)
2. Run the build process docker-compose build
3. Bring everything up docker-compose up
4. Verify a content file that only exists in the production bucket can be accessed via localhost:8081. A real example, http://localhost:8081/content/storage/0/d/0d66e3e3c85faf413bc0033dcb6510ce.pdf
5. Verify a content file that only exists in the development bucket can be accessed via localhost:8081. A real example, http://localhost:8081/content/storage/b/b/bbfad3ef03bc1e08d3c31ad8052ee5b5.pdf
6. Upload a file to your local Studio instance
7. Find its URL and ensure it can be accessed via localhost:8081

Post-merge followup

When this is merged, we can proceed with cleaning things up:

1. Restore a production database to hotfixes and unstable
2. Empty the development bucket
3. Remove the nightly storage transfer job

[bjester]

Python tests failed, but they pass locally. I just realized I need to update the Github workflow. On it