NextCloud

I use an all-in-one image, which is not the AIO or all-in-one image. I don't know why there's a project named that which adds a bunch of stuff and is not actually all-in-one but it makes things confusing. :D

The only way I could get this working when I first started using Cosmos as a reverse proxy was to use the CasaOS compose, so this is modified from that: https://azukaar.github.io/cosmos-casaos-store/servapps/Nextcloud/docker-compose.yml

Apparently, I should be using the instructions from https://hub.docker.com/_/nextcloud/