Provide only Nextcloud install script

Right now, we provide install script and Nextcloud. In some cases, this is a little bit problematic when you are switching to different branches and Nextcloud is downgraded and such. Currently, I am updating Nextcloud in minor versions, because on various storage devices it takes different time (my experience is ~30min] because there is also update of Nextcloud, database and so on.

There are two possibilities:

  1. Nextcloud is able to update itself - on click / automatically. We can provide just install script and Nextcloud itself will take a rest including the update. Why we shouldn't let do it itself? I think they should be able to update it much better than us currently.

  2. Provide Turris OS updates very often