Add another hint to readme

README.md

@@ -4,3 +4,4 @@ Follow [this guide](https://rmm.li/wiki/doku.php?id=linux_server_manuals:nextclo
 
 - To map existing users, make sure that the username in Keycloak and Nextcloud is the same
 - In Nextcloud disable the option that the NameID response needs to be encrypted
+- For monitoring, use the URL https://domain/index.php/login?direct=1