Update user docs for Central v2024.2

[matthew-white]

• Changes to ops (@lognaturel TODO)
  • In the docs here, we suggest rebuilding nginx. But @lognaturel says that with .2, nginx will just need to be restarted: "The logic to put the certs in the right place and everything is in the command that’s run at container start time." In general: "settings changes should not require rebuilds."
  • @lognaturel: "I think we’ll want to document for folks who use their own infrastructure that we now publish images."
  • The struck out text about configuring custom certs is now tracked at Update user docs for Central v2024.3 #1855
  • PR: Add Central v2024.2 upgrade instructions #1858
• Upgrade instructions
  • PR: Add Central v2024.2 upgrade instructions #1858
• S3
  • If provider has a region concept, use a region-agnostic URL, the region will be requested
  • Must use an HTTPS URL
  • No rebuild needed when changing config, just stop and restart
  • If using a custom database, might have to add pgrowlocks extension manually
  • Audit log events only if there were blobs to process, otherwise nothing; use the CLI to check if it can run; there should be a log event for each day during which files were uploaded
  • PR: central-install: document s3 config #1859