title: res.sendFile send static file + object
body: <p>I have to serve a html file with express, but also want to send an object along with the response.
  How can i send both - the detail.html and the object 'car' - and how can i access it at the client side?</p>
  
  <pre><code>app.get('/unit/:id', function (req, res) {
  console.log(req.params.id)
  var car = {type:"Fiat", model:"500", color:"white"};
  res.sendFile(__dirname + '/detail.html', car);
  });
  </code></pre>