title: Ensure service worker is updated when hosted on a CDN?
body: <p>In production, our static files are served via Akamai (but on our domain), including our service worker.</p>
  
  <p>By default we're caching the service worker but it doesn't seem to always be getting updataed. </p>
  
  <p>What is the right strategy here? Should we set the service worker not to be cached ever and take a hit for every call in the service worker to pull the new service worker each time?</p>