Immich via compose + Linuxserver's labels

Hi guys!

I've recently setup immich on unraid, using the compose plugin, as per the Dev's documentation.

I'd like to get immich to play nice with swag+authentik, setup as per ibracorp's tutorial, which requires all the containers meant to use swag on the same custom docker network and uses either labels or custom conf files to activate docker containers in swag.

My specific questions are: how to force immich to use a custom network and how to use labels (or write a specific conf file for immich)?