Snap integration with Collabora Online Docker container?

I’ve been really enjoying using Nextcloud – specifically through the snap package.

I’m unsure on how I can set up Collabora Online (via Docker) with the Snap package; I couldn’t find any documentation anywhere about this configuration setup specifically.
I’ve tried changing ports on the snap (http//s) to 81//444 respectively then proxy the traffic through a webserver on 80 & 443 – this didn’t work.

Has anybody set it up before and would be able to point to in the right direction or provide me with instructions?

If this isn’t possible, should I resort to installing Nextcloud on a plain webserver and manually configure everything else?

Would be much appreciated.
Thank you!