title: Angular5 PWA doesn't refresh (Service Workers)
body: <p>I'm developing an app with angular5, using service workers via the ng-cli, but I realized that after the first time the app shell loads, it doesn't refresh. How can I push new file versions to my app after build it with <code>ng build</code>?. I could directly rewrite the sw.js manually, but as it is generated via the cli, I don't like to affect anything I don't know what is for.</p>
  
  <p>I'm looking for this answer all day, but as service workers are new for the 1.6 version of the ng-cli, I have not found any.</p>
  
  <p>I even found a thread similar thread for angular 4 and a unofficial service workers implementation before ng-cli 1.6, but I don't trust in that approach since it is not official, so I would like to know if you guys could help me find a way to control the way it installs the shell and looks for new versions.</p>
  
  <p>Thank you</p>