BYOD with Caddy(Bring your own domain)
People can point their domains to your server IP and it'll automatically issue SSL's. (Can be abused by sending sketchy Host headers, stay safe :) )
This setup assumes that bareserver/website is running on port 8080.
Adjust that accordingly and you have BYOD.
This is not a good robust setup, but it should work, you might get DDoS'd or ratelimited