title: create-react-app npm run start in production mode. Maybe not possible?
body: <p>I need to run the server like I simply do with:</p>
  
  <p><code>npm run start</code></p>
  
  <p>but I need to use the production mode. Is this possible?</p>
  
  <p>In ember or angular it is possible. How to do in <code>create-react-app</code>?</p>
  
  <p>I tried <code>npm run start --prod</code> but nothing.</p>