Start a new app
Set up a new Rails app using the default React on Rails Pro path (no license key required; production is free for small organizations, charities, schools, and hospitals, and a subscription for larger organizations) with TypeScript and server-side rendering. Follow the official guide at https://reactonrails.com/docs/getting-started/create-react-on-rails-app exactly; don't improvise commands or versions. Use --standard only when you intentionally want an open-source-only scaffold.