title: get qr code via npm start to run react-native app on Expo emulator
body: <p>I've created an app with:</p>
  
  <pre><code>npm i -g create-react-native-app
  create-react-native-app my-project
  cd my-project
  npm start
  </code></pre>
  
  <p>But when I run <code>npm start</code> no QR code is shown to cast via Expo app.
  How can I get this QR Code?</p>