How to build a chat app with Ruby on Rails

I recently put together a chat build tutorial where strangers can connect with each other via advanced group chats. I wanted to run it here and see if there's any suggestion or feedback to make it better
Here's the GitHub link - https://github.com/cometchat-pro-samples/ruby-on-rails-chat
https://www.cometchat.com/tutorials/add-chat-to-your-ruby-on-rails-app/