build: update dependencies

Update dependencies and configure the app for angular material and flex
layout.

Fixes #44

src/app/app.module.ts

@@ -4,13 +4,11 @@ import { FormsModule } from '@angular/forms';
 import { HttpClientModule } from '@angular/common/http';
 import { ServiceWorkerModule } from '@angular/service-worker';
 import { TranslateModule } from '@ngx-translate/core';
-import { NgbModule } from '@ng-bootstrap/ng-bootstrap';
-import { AlertModule } from 'ngx-bootstrap';
 import { NgxChartsModule } from '@swimlane/ngx-charts';
 
-import { environment } from '@env/environment';
-import { CoreModule } from '@app/core';
-import { SharedModule } from '@app/shared';
+import { environment } from '../environments/environment';
+import { CoreModule } from '../app/core';
+import { SharedModule } from '../app/shared';
 import { HomeModule } from './home/home.module';
 import { AboutModule } from './about/about.module';
 import { ClientsModule} from './clients/clients.module';
@@ -28,8 +26,6 @@ import { SelfServiceModule } from './self-service/self-service.module';
     FormsModule,
     HttpClientModule,
     TranslateModule.forRoot(),
-    NgbModule.forRoot(),
-    AlertModule.forRoot(),
     NgxChartsModule,
     CoreModule,
     SharedModule,