feat: use http interceptor for backendless development

Note: intercept method of the FakeBackendInterceptor should
be developed further whenever it is needed to fake a response
from the backend.

Closes #37

src/app/app.module.ts

@@ -23,6 +23,7 @@ import {StatusBar} from '@ionic-native/status-bar/ngx';
 import {IonicModule, IonicRouteStrategy} from '@ionic/angular';
 import {TranslateLoader, TranslateModule} from '@ngx-translate/core';
 import {TranslateHttpLoader} from '@ngx-translate/http-loader';
+import {fakeBackendProvider} from './_helpers/fake-backend.interceptor';
 import {AppRoutingModule} from './app-routing.module';
 import {AppComponent} from './app.component';
 import {ConfigModule} from './modules/config/config.module';
@@ -59,6 +60,8 @@ export function createTranslateLoader(http: HttpClient) {
     CommonModule,
   ],
   providers: [
+    // use fake backend in place of Http service for backendless development
+    fakeBackendProvider,
     StatusBar,
     SplashScreen,
     {provide: RouteReuseStrategy, useClass: IonicRouteStrategy},