cleaned up

src/app/app.ts

@@ -2,10 +2,10 @@
 import { Component, OnInit, signal, ApplicationRef, inject, DestroyRef } from '@angular/core';
 import { Router, RouterOutlet, NavigationEnd } from '@angular/router';
 import { Title } from '@angular/platform-browser';
+import { HttpClient } from '@angular/common/http';
 import { HeaderComponent } from './components/header/header.component';
 import { FooterComponent } from './components/footer/footer.component';
 import { BackButtonComponent } from './components/back-button/back-button.component';
-import { ApiService } from './services';
 import { interval, concat } from 'rxjs';
 import { filter, first } from 'rxjs/operators';
 import { takeUntilDestroyed } from '@angular/core/rxjs-interop';
@@ -27,7 +27,7 @@ export class App implements OnInit {
   serverAvailable = signal(false);
 
   private destroyRef = inject(DestroyRef);
-  private apiService = inject(ApiService);
+  private http = inject(HttpClient);
   private titleService = inject(Title);
   private swUpdate = inject(SwUpdate);
   private appRef = inject(ApplicationRef);
@@ -55,7 +55,7 @@ export class App implements OnInit {
 
   private checkServerHealth(): void {
     this.checkingServer.set(true);
-    this.apiService.ping()
+    this.http.get<{ message: string }>(`${environment.apiUrl}/ping`)
       .pipe(takeUntilDestroyed(this.destroyRef))
       .subscribe({
         next: () => {