Thanks to the amazing work of @edoardo_spadoni, we released the Nextcloud Cockpit application.
At first access, the UI will display the default admin password inside a warning. The warning will be cleared after password change.
From the configuration page, you can edit the virtualhost and the trusted domains:
You can even overwrite CalDAV/CardDav auto-discovery URL (/cc @danb35):
Last but not least, the application log:
Everything is already available in stable repository, but feel free to raise any issue!