Doc: Update Nextcloud app doc

readme/nextcloud_app.md

@@ -1,10 +1,40 @@
-# Nextcloud App
+# Joplin Web API for Nextcloud
 
 **This is a beta feature, not yet completed. More info coming soon!**
 
-The Joplin Nextcloud App is a helper application that enables certain features that are not possible otherwise. In particular:
+The app can be downloaded from there: https://apps.nextcloud.com/apps/joplin
 
-- [Done] Sharing a note publicly
+The Joplin Web API for Nextcloud is a helper application that enables certain features that are not possible otherwise. In particular:
-- [Not done] Sharing a note with another Joplin user (who uses the same Nextcloud instance)
+
-- [Not done] Collaborating on a note
+- Sharing a note publicly
-- [Not done] Sharing a notebook
+- Sharing a note with another Joplin user (who uses the same Nextcloud instance)
+- Collaborating on a note
+- Sharing a notebook
+
+## FAQ
+
+> Does it work with encrypted notes?
+
+No
+
+> Does it render images and other attachments?
+
+No
+
+> How about math formulas?
+
+No
+
+> Can I share a notebook?
+
+No
+
+> Can I edit a shared note directly on the browser?
+
+No
+
+## TODO
+
+- [ ] Handle encrypted notes (shared notes will be unencrypted on server)
+- [ ] Move Joplin note rendererer to separate package and re-use it to render notes in the Nextcloud app
+- [ ] Allow editing note in browser