Custom configuration support

[bartversluijs]

Hi,

I can't seem to find a way to change the postgres configuration (like the shared_buffers configuration).
This is because the PGDATA is changed by the balena-entrypoint.sh.

But maybe I'm wrong and there is a built-in way to do it, or a suggested approach?
And, since I'm already asking about the configuration, are there any suggestions / best-practices in order for the database to take full benefit of the server?

Thanks in advance!

[bartversluijs]

After some playing around with PostgreSQL, is it an idea to set a default include_dir path, to at least have the ability to extend the current postgres configuration?

A suggestion for this path could be /balena/postgresql/conf.d. A user can create a volume for that path and create custom configurations, which will (probably) work throughout Postgres updates!

Let me know what you think!
I don't have the know-how to create a PR for this, but it'd be a nice added feature :)