Use mariadb over postgres whenever possible
See #1134 (closed) for details. Postgres is nice but manual intervention on upgrades makes it a pain to maintain, and is the complete opposite of what we want to achieve with Stanckspin.
We use postgres in
- SSO (single-sign-on#132 (closed))
- ONLYOFFICE (mariadb is supported, should be implemented in our helm chart): nextcloud#1011 (closed)
- Zulip (no alternative to postgres)
Edited by Arie Peterson