fix update listening

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

@@ -10,6 +10,8 @@ export class ServiceWorkerService {
 
     newAppVersionIsAvailable = new BehaviorSubject<boolean>(false);
 
+    private isListening = false;
+
     constructor(appRef: ApplicationRef, updates: SwUpdate) {
 
         //https://angular.io/guide/service-worker-communications
@@ -30,9 +32,15 @@ export class ServiceWorkerService {
         // });
 
         const updateCheckTimer$ = interval(6 * 60 * 60 * 1000);
+
+        appRef.isStable.subscribe(() => {
+            if (this.isListening) return;
+            this.isListening = true;
+
             updateCheckTimer$.subscribe(() => {
                 updates.checkForUpdate();
             });
+        });
     }
 
     loadNewAppVersion() {

src/manifest.json

@@ -5,7 +5,7 @@
   "background_color": "#fafafa",
   "display": "standalone",
   "scope": "/",
-  "start_url": "/index.html",
+  "start_url": "/",
   "icons": [
     {
       "src": "assets/icons/icon-72x72.png",