title: angular-cli change port to 3000 in angular-cli.json
body: <p>i use the material todo app from Daniel Zen and want to change to port in the angular-cli.json.
  <a href="https://github.com/danielzen/material-todo" rel="noreferrer">https://github.com/danielzen/material-todo</a></p>
  
  <p>But this doesn't work.
  I tried this:</p>
  
  <pre><code>{
    "port" : 3000,
  </code></pre>
  
  <p>But nothing happens.
  Anyone an idea?</p>