title: Image not cache in create-react-app project
body: <p>I know most of the image in website will be either memory or disk cache, but why all of my images is not cache everytime I refresh my page.</p>
  
  <p>It is default in development server? or It cause by bug?</p>
  
  <p>I create my react project with <strong>create-react-app</strong></p>