Pi-Hole/Unbound Nginx Proxy Manager and owncloud or nextcloud

I have a PI running Pi-Hole/unbound and docker with Nginx Proxy Manager. Would it be a poor idea to run owncloud or nextcloud on the same PI? If not where do I find the config files to modify the ports so there is no conflict with Nginx Proxy Manager?

Is PiHole running inside Docker as container or as native application installed via our software repository?

Native, Niginx Proxy Manager is in docker container.

If PiHole is running as native web server app, you already have a web server running. This one would be reused by Nextcloud. Let’s check it

ss -tulpn | grep LISTEN