fix: production build on gh-pages

Fixes: #416

src/app/clients/clients.service.ts

@@ -10,8 +10,6 @@ import { Observable } from 'rxjs';
 @Injectable({
   providedIn: 'root'
 })
-
-@Injectable()
 export class ClientsService {
   /**
    * @param {HttpClient} http Http Client to send requests.

src/app/pipes/fetch-image.pipe.spec.ts

@@ -1,8 +0,0 @@
-import { FetchImagePipe } from './fetch-image.pipe';
-
-describe('FetchImagePipe', () => {
-  it('create an instance', () => {
-    const pipe = new FetchImagePipe();
-    expect(pipe).toBeTruthy();
-  });
-});