Nextcloud Trusted Domains

Help
1

Runtipi 4.3.0
After starting NC I got the message

Bitte kontaktiere deinen Administrator. Wenn du Administrator bist, bearbeite die „trusted_domains“-Einstellung in config/config.php. Siehe Beispiel in config/config.sample.php.

I need help to get this entry into config.php in Docker.

2

This happens if you don’t call the app via it’s configured domain. Is this the case?