Move from standalone container to separate web and data containers

[Falco]

You can follow this guide that goes over setting the credentials:

Running Discourse with a separate PostgreSQL server

Let’s say you’re using AWS RDS, or an existing PostgreSQL server managed elsewhere. It’s fairly straightforward to get Discourse to use such a setup, without needing to grant superuser privileges to anything that Discourse itself runs. Here’s how. 0. Prerequisites Discourse requires PostgreSQL 13 or later; if you try to run on an older version, it might work, but we don’t guarantee it, and if something breaks in the future, you get to keep both pieces. We also require some extensions that ar…