instead of

image: postgres:16-alpine

use

image: pgautoupgrade/pgautoupgrade:16-alpine

Then all the upgrade instructions of backup->update->import backups go away and all you need to do is restart the docker container. (still keep backups though!)

Reference: https://github.com/LemmyNet/lemmy/pull/4892/files

Since that pull request was merged, this will simplify future updates like 0.19.6 or 0.20.0