fix serviceworker registration and update check

src/app/app.component.ts

@@ -129,9 +129,6 @@ export class AppComponent implements OnInit, OnDestroy {
 
     closeAutoUpdate(): boolean {
         this.updateAvailable = false;       
-        setTimeout(() => {
-            this.updateAvailable = true;
-        }, 2000);
         return false;
     }
 }

src/app/services/service-worker.service.ts

@@ -22,11 +22,17 @@ export class ServiceWorkerService {
         });
 
         // Allow the app to stabilize first, before starting polling for updates with `interval()`.
-        const appIsStable$ = appRef.isStable.pipe(first(isStable => isStable === true));
-        const everySixHours$ = interval(2 * 60 * 60 * 1000);
-        const everySixHoursOnceAppIsStable$ = concat(appIsStable$, everySixHours$);
+        //const appIsStable$ = appRef.isStable.pipe(first(isStable => isStable === true));
+        // const everySixHoursOnceAppIsStable$ = concat(appIsStable$, everySixHours$);
+        // everySixHoursOnceAppIsStable$.subscribe(() => { 
+        //     console.warn('wat?');
+        //     updates.checkForUpdate();
+        // });
 
-        everySixHoursOnceAppIsStable$.subscribe(() => updates.checkForUpdate());
+        const updateCheckTimer$ = interval(2 * 60 * 60 * 1000);
+        updateCheckTimer$.subscribe(() => {
+            updates.checkForUpdate();
+        });
     }
 
     loadNewAppVersion() {

src/main.ts

@@ -9,4 +9,9 @@ if (environment.production) {
 }
 
 platformBrowserDynamic().bootstrapModule(AppModule)
+    .then(() => {
+        if ('serviceWorker' in navigator && environment.production) {
+            navigator.serviceWorker.register('./ngsw-worker.js');
+        }
+    })
     .catch(err => console.log(err));