Setting up nextcloud and letsencrypt on RPI4 with openmediavault

I am trying to set up nextcloud with letsencrypt on a raspberry pi 4 with openmediavault 5 installed. I’m following the " Nextcloud with Letsencrypt using OMV and docker-compose" guide on the openmediavault forum, and the guide on your blog.

I forwarded ports 444 to 443 and 81 to 80. I’ve installed your nextcloud, letsencrypt, and duckdns container using portainer. The docker-compose.yml file is here. My config.php file is here. The last entry to the letsencrypt log is here (let me know if I did not copy enough of the log file, there are many more entries above this one).

If I run this setup, and then go to https://nextcloud.my.duckdns.org/, or within the LAN to port 444 on my raspberry pi, I get a “welcome to our server” message (as in the attached screenshot). I’m a beginner at all of this. Can you help me figure out where my mistake is?

gnome-shell-screenshot-M9UIK0