title: VueRouter and Express.js
body: <p>when i use the <strong>express.js</strong> to buid the server and <code>xxxxx:3000</code>(my root url).<br/>
  in this state i use then <strong>vue-router</strong> to <code>xxxxx:3000/foo</code> (<strong>anther child path</strong>) is work.<br/>
  <hr/>
  the <strong><em>question</em></strong> is when i <strong>refresh</strong> then page width url(<code>xxxxx:3000/foo</code>),it show me then 404(Cannot GET /foo1).
   i try to  <strong>redirect</strong> when i refresh the page with the url has <strong>/foo</strong>?</p>