Upgrade-procedure.md

 ### faircloud upgrade procedure
 
-This is an internal documentation for fairkom sysadmins. We have to upgrade nextcloud every few months.
+This is a documentation for fairkom sysadmins. We have to upgrade nextcloud every few months. We share our experience and steps here.
 
 1. announce maintenance with Announcement app
 1. in /var/www/nextcloud/config/config.php set `'maintenance' => true,`