Create a new Rails application. More information: https://guides.rubyonrails.org/command_line.html#rails-new.
blog in the current directory:rails new blog
rails new {{app_name}} --api
postgresql as the database:rails new {{app_name}} {{[-d|--database]}} postgresql
rails new {{app_name}} {{[-J|--skip-javascript]}}
rails new {{[-h|--help]}}