++nextcloud doc update

apps/nextcloud/README.md

@@ -1,6 +1,15 @@
 ## Missing
 
-- db secret generation (sops?)
 - SMTP settings / secrets (ungleich mail + sops?)
 - Exposing sizes in value.yaml (db, gitea)
   - Maybe reducing to 1 PVC?
+
+## Problems
+
+* nginx and fpm need to share filesystem/data
+  * might be able to workaround with copying (a bit ugly)
+  * Sharing via cephfs is non-optimal
+  * Maybe separate data volume?
+    * Separating apps & data
+* apache stays listening on port 80
+* Trusted domain not set yet