Notification system in frontend

- Heatmap worker now reports progress
- Base for new altitude value
- Phones can be marked active

frontend/src/app/app.module.ts

@@ -14,10 +14,12 @@ import { LoginComponent } from './login/login.component';
 import { MapComponent } from './map/map.component';
 import { UserComponent } from './user/user.component';
 import { DashboardWidgetComponent } from './dashboard-widget/dashboard-widget.component';
-import { IMqttServiceOptions, MqttModule } from 'ngx-mqtt';
+import { MqttModule } from 'ngx-mqtt';
 import { ServiceWorkerModule } from '@angular/service-worker';
 import { environment } from '../environments/environment';
 import { AdminComponent } from './admin/admin.component';
+import { AlertComponent } from './_alert/alert/alert.component';
+import { FontAwesomeModule } from '@fortawesome/angular-fontawesome';
 
 @NgModule({
   declarations: [
@@ -28,12 +30,14 @@ import { AdminComponent } from './admin/admin.component';
     FilterComponent,
     UserComponent,
     DashboardWidgetComponent,
-    AdminComponent
+    AdminComponent,
+    AlertComponent
   ],
   imports: [
     BrowserModule,
     AppRoutingModule,
     BrowserAnimationsModule,
+    FontAwesomeModule,
     FormsModule,
     HttpClientModule,
     MqttModule.forRoot({}),
@@ -41,7 +45,8 @@ import { AdminComponent } from './admin/admin.component';
       accessToken: 'pk.eyJ1IjoibW9uZGVpMSIsImEiOiJja2dsY2ZtaG0xZ2o5MnR0ZWs0Mm82OTBpIn0.NzDWN3P6jJLmci_v3MM1tA'
     }),
     ChartsModule,
-    ServiceWorkerModule.register('ngsw-worker.js', { enabled: environment.production })
+    ServiceWorkerModule.register('ngsw-worker.js', { enabled: environment.production }),
+    FontAwesomeModule
   ],
   providers: [],
   bootstrap: [AppComponent]