The Caddyfile boils down to

Yep! I have it setup where almost everything is configured using environment variables/docker secrets. Currently the only configuration file that needs to be passed into the Phorge container is for Configuring Outbound Email since that can vary quite a bit. NGINX has a config file but the only modifications it needs are sections to be commented/uncommented if it's used for SSL termination, otherwise everything is set using environment variables. Of course NGINX could be swapped out for your web server of choice. I might look into providing a example that uses Caddy for the web server as it has native support for ACME and should be pretty easy to do.