docs: add eng version for nextcloud faq

content/en/docs/Services/nextcloud.md

@@ -22,4 +22,17 @@ To add new users, go to the user administration panel, on the web interface of y
 ## Recommended clients
 
 - WEB interface: available after SelfPrivacy server configuration, at `https://cloud.YOUR.DOMAIN`
-- [Official application](https://nextcloud.com/install/#install-clients) (GNU/Linux, Windows, macOS, Android, iOS)
+- [Official application](https://nextcloud.com/install/#install-clients) (GNU/Linux, Windows, macOS, Android, iOS)
+
+
+### FAQ
+
+### Nextcloud Updater does not work
+It's fine, it should be. Nextcloud is updated via NixOS, and depends on our NixOS repository. Everything happens without your intervention.
+
+### Why can't I use my Nextcloud in third-party services?
+This can happen if the third-party service has a restriction to only connect to a specific Nextcloud instance.
+
+### Should I use an extension to encrypt my Nextcloud?
+We do not recommend it. The encryption keys are stored on the server, which makes such encryption practically useless. 
+Also, during our tests, the extension was not stable and the authors had unfixed bugs in the code.