Update/migrate to docker image Nextcloud 18
Should be easy. I'd gladly create the PR myself.
- Up to date, better stuff
- All currently preconfigured apps are supported in Nextcloud 18 now, including rainloop - actually, it is not a pro, but not a con
- Solves problems #1001 1 -> easier setup and lower resource usage (possibly)
Cons: Tell me, I don't know, other than it needs some effort.
If accepted, then I'd create an issue to remove the openoffice in its entirety from the setup