One of the main problems of the Nextcloud module is that it's currently
not possible to alter e.g. database configuration after the initial
setup as it's written by their imperative installer to a file.
After some research[1] it turned out that it's possible to override all values
with an additional config file. The documentation has been
slightly updated to remain up-to-date, but the warnings should
remain there as the imperative configuration is still used and may cause
unwanted side-effects.
Also simplified the postgresql test which uses `ensure{Databases,Users}` to
configure the database.
Fixes #49783
[1] https://github.com/NixOS/nixpkgs/issues/49783#issuecomment-483063922
nixos/nextcloud: Add documentation for nextcloud app installation and updates
nixos/nextcloud: Enable autoUpdateApps in nextcloud test
nixos/nextcloud: Fix typo in nixos/modules/services/web-apps/nextcloud.xml
Co-Authored-By: Florian Klink <flokli@flokli.de>
nixos/nextcloud: Escape html in option description
nixos/nextcloud: Fix autoUpdateApps URL in documentation.
Co-Authored-By: Florian Klink <flokli@flokli.de>
