Sounds like a question for portainer support. No idea since they have their own system.
Here is the Nextcloud method if you decide to use it: HowTo: Add a new trusted domain - #29 by djw0mbat
Sounds like a question for portainer support. No idea since they have their own system.
Here is the Nextcloud method if you decide to use it: HowTo: Add a new trusted domain - #29 by djw0mbat