Add services

frontend/ng-karaoqueue/src/app/song-service.service.ts

@@ -0,0 +1,17 @@
+import { Injectable } from '@angular/core';
+import { HttpClient, HttpHeaders } from "@angular/common/http";
+import { Song } from './models/song.model';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class SongServiceService {
+
+  constructor(
+    private http: HttpClient
+  ) {}
+
+  searchSongByText(text:string):Array<Song> {
+      return [new Song()];
+  }
+}