add environments and configuration.service.ts for admin

admin/src/app/services/configuration.service.ts

@@ -0,0 +1,13 @@
+import { Injectable } from '@angular/core';
+import { environment } from '../../environments/environment';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class ConfigurationService {
+
+  public getApiUrl(): string{
+    return environment.apiUrl;
+  }
+
+}

admin/src/app/services/configuration.spec.ts

@@ -0,0 +1,16 @@
+import { TestBed } from '@angular/core/testing';
+
+import { ConfigurationService } from './configuration.service';
+
+describe('Configuration', () => {
+  let service: ConfigurationService;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({});
+    service = TestBed.inject(ConfigurationService);
+  });
+
+  it('should be created', () => {
+    expect(service).toBeTruthy();
+  });
+});