How to start a new Rails project with Rails 8.0.0.beta1

How to start a new Rails project using Rails 8.0.0.beta1

gem install -v 8.0.0.beta1 rails
rails _8.0.0.beta1_ new my_new_app_on_rails8_beta

How to start a new Rails project with Rails main: 

rails new my_app_on_rails_main --main

I wrote a longer article about this here, but with examples from Rails 7.1.0.beta1