Added the root container element <div> with id of 'react-app' for the future React app to render into.

Author: maratbn

try_me.html

@@ -9,6 +9,7 @@
         http://maratbn.com/blogs/2017/01/14/minimalistic-react-webapp/
       </a>
     </p>
+    <div id='react-app'></div>
     <script type='text/javascript' src='webpack_out/minimalistic_react.js'></script>
   </body>
 </html>