code: func refetchCAPeriod(c context.Context) time.Duration {
  	if info.IsDevAppServer(c) {
  		return 100 * time.Millisecond
  	}
  	return RefetchCAPeriod
  }
docs: // refetchCAPeriod returns for how long to cache the CA in memory by default.
  //
  // On dev server we cache for a very short duration to simplify local testing.