title: How to specify which domain using ngrok
body: <p>I use mamp and I have virtual hosts all on port 8888. For example:</p>
  
  <ul>
  <li>site1.dev:8888</li>
  <li>site2.dev:8888</li>
  </ul>
  
  <p>would point to <code>localhost/site1/</code>, <code>localhost/site2/</code> etc.</p>
  
  <p>Before using virtual hosts, I would just change my docroot to whatever project I was currently working on and would start ngrok like so</p>
  
  <p><code>./ngrok http 8888</code> and it would launch and give me a random generated *.ngrok.io url.</p>
  
  <p>My question is how do I specify the domain now since I am using virtual hosts?</p>
  
  <p>I've tried <code>./ngrok http site1.dev:8888</code> and it starts but just serves up mamps webroot.</p>
  
  <p>I am using a free account.</p>