add chat domain service

src/app/services/domain/chat/chat-service.service.spec.ts

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

src/app/services/domain/chat/chat-service.service.ts

@@ -0,0 +1,9 @@
+import { Injectable } from '@angular/core';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class ChatServiceService {
+
+  constructor() { }
+}