npm install -g yarnin your terminal.
yarn installto install the project's dependencies. This can take a while and will install over a thousand code libraries in the
node_modulesfolder. We're building on the shoulders of giants!
yarn startto spin up a local development server that serves our application. If your browser doesn't launch, visit
localhost:3000. Create React App will auto-reload when you save a file, but sometimes you may need to stop the server and run the command again. (Use Ctrl+C in the terminal to stop your app.)