remove alert and change tracer

src/app/services/background.service.ts

@@ -21,7 +21,7 @@ export class BackgroundService {
     private themeservice: ThemeService,
     private storageservice: StorageService,
     private http: HttpClient,
-  ) { 
+  ) {
 
     window.addEventListener('focus', (event) => {
       if(this.status == 'offline') {
@@ -35,7 +35,7 @@ export class BackgroundService {
       return false
     }
     this.status = 'online'
-    
+
     this.paint()
     this.callBacks.forEach((e) => {
       if (e.type == 'Online') {
@@ -104,14 +104,14 @@ export class BackgroundService {
     }
 
     try {
-      await this.http.post(environment.apiURL + "UserAuthentication/Login", '', opts).toPromise();
-      
+      await this.http.get("assets/images/theme/gov/governoangola_A.png").toPromise();
+
       return true
     } catch (error) {
 
       if(error.status === 0) {
         return false
-      } 
+      }
 
       return true
     }