Multiple SSL certificate for a multiple domain in a multi-tenant application.

How do I configure ssl certificate for multiple domain. Deployed application using this guide "Deploy Ruby On Rails:
Ubuntu 20.04 Focal Fossa in 2020".

I've switched to using https://github.com/acmesh-official/acme.sh for SSL on Ubuntu 20.04 and it works great.

Definitely recommend it. It's what we use in Hatchbox.io for SSL.

Is there any episode showing how to configure it?

No screencast yet, but their readme is pretty well documented. 👍