title: URL hash-bang (#!/) prefix instead of simple hash (#/) in Angular 1.6
body: <p>My URLs on an AngularJS project have changed from <code>localhost:3000/admin#/</code> to <code>localhost:3000/admin#!/</code> since the last time I worked on my project...</p>
  
  <p>Nothing found on the web, does someone know what this is ?</p>