title: Hook into angular-cli build watch
body: <p>I'd like to to know if it is possible to hook into angular-cli's build/watch command:</p>
  
  <blockquote>
    <p>ng build /w</p>
  </blockquote>
  
  <p>which generates files and drops them in the project's <code>/dist</code> folder</p>
  
  <p>I just want after the build completes to copy the dist folder to another directory, is it possible?</p>