title: create-react-app doesn't work with proxy
body: <p>I use create-react-app to bootstrap my react app, I did this in my package.json </p>
  
  <p><code>"proxy":"http://localhost:3001"</code> because my api server is running on 3001, but I fire request using axios, it still point to port 3000, any clue what is missing? restarted my app several times it still the same.</p>