docs: standalone psql pg_hba.conf error help

[WillForan]

No description provided.

[github-actions]

Label error. Requires exactly 1 of: changelog:.*. Found: documentation

[mmomjian]

Thanks for the PR. I really don’t know how I feel about adding such basic Postgres knowledge to our docs.

if you don’t already know how to do this, my opinion is that you should not use a standalone postgres. Perhaps others disagree with me, though.

[WillForan]

Thanks for looking and I can agree. The error message is relatively straight forward and easily searched (though I can only say that now with the clarity of hindsight).

The part that caught me: I (erroneously) thought I'd already allowed all of ipv4 in my config and was convinced Immich was ignoring DB_URL for a docker-compose connection (or something). I also went for a SSL tangent thinking the the "no encryption" part implied Immich requires it.
After longer than I'd like to admit, I realize the error in the log was forwarded on from the standalone server and not related to the Immich server. ... That's probably a pretty niche confusion.

[bo0tzz]

Thanks for the PR! I agree with mmomjian, I think this is basic postgresql admin knowledge that you should be able to figure out yourself if you choose to run a standalone database. I also think we shouldn't be telling people to set the auth to trust, because someone will blindly copy that and get their database pwned.