title: Embed react app with react router inside of another webpage
body: <p>I need to embed a react app inside of another non-react webpage. The react app uses react router for navigation. I have successfully rendered the react app, however the routes do not work correctly. </p>
  
  <h2>Setup</h2>
  
  <ul>
  <li>Parent page domain = test.com</li>
  <li>Embedded react app is using version <code>3.x</code> and <code>hashHistory</code>.</li>
  <li>When I use a route in the react app the router changes the URL to <code>test.com#/newPage</code>. </li>
  </ul>
  
  <p><strong>This is the error</strong>. I think it should be test.com/#/newPage instead of test.com#/newPage. How can I configure react router to use the correct url?</p>