title: Ionic serve not working in Ionic 3
body: <p>My Ionic info:</p>
  
  <pre><code>cli packages: (/usr/lib/node_modules)
  
  @ionic/cli-utils  : 1.9.2
  ionic (Ionic CLI) : 3.9.2
  
  global packages:
  
  Cordova CLI : 7.0.1 
  
  local packages:
  
  @ionic/app-scripts : 3.1.0
  Cordova Platforms  : browser 4.1.0
  Ionic Framework    : ionic-angular 3.9.2
  
  System:
  
  Node : v6.9.0
  npm  : 3.10.8 
  OS   : Linux 4.4
  </code></pre>
  
  <p>Ionic serve is working fine, but does not detect any file changes! </p>
  
  <p>The problem appears only for Ionic v3 and v2 projects.</p>
  
  <p>My Ionic v1 projects are working fine.</p>