Added PWA manifest with icons and service.

src/app/app.module.ts

@@ -13,6 +13,8 @@ import { RegonComponent } from './components/regon/regon.component';
 import { IbanComponent } from './components/iban/iban.component';
 import { IdentityCardComponent } from './components/identitycard/identitycard.component';
 import {NgOptimizedImage} from "@angular/common";
+import { ServiceWorkerModule } from '@angular/service-worker';
+import { environment } from '../environments/environment';
 
 @NgModule({
   declarations: [
@@ -33,6 +35,12 @@ import {NgOptimizedImage} from "@angular/common";
         MatSnackBarModule,
         ReactiveFormsModule,
         NgOptimizedImage,
+        ServiceWorkerModule.register('ngsw-worker.js', {
+          enabled: environment.production,
+          // Register the ServiceWorker as soon as the application is stable
+          // or after 30 seconds (whichever comes first).
+          registrationStrategy: 'registerWhenStable:30000'
+        }),
     ],
   providers: [TranslatePipe],
   bootstrap: [AppComponent]