I gave up trying to use Nextcloud in the end, so didn't write the how-to. Nextcloud is dependent on too many plugins over which it has little or no control. Because of the way its designed, if you install the wrong one it can easily break the whole site, and often, by the time a new Nextcloud update is available, the plugin authors have not updated their plugins, so you lose that functionality. That' makes for a lousy end-user experience and a DevOp nightmare to manage.