Docker with non-Docker Apache setup

I’m running my own mail and cloud server on the latest LTS Ubuntu Server.

I’m using Apache (with a letsencrypt cert) for the cloud (Nextcloud) and am looking at installing BitWarden to make pw management easier.

Bitwarden,however,only comes in Docker, which complicates things somewhat (at least for me).

I can’t seem to find a standard approach of interacting a docker instance with an non docker Webserver (Apache).

One suggestion I did find is to reverse proxy the Aapache Server, but even that suggestion was vary vague on that has to happen on the docker side.

Any pointers are greatly appreciated