app.module.ts

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';

import { AppComponent } from './app.component';
import { ApolloModule } from 'apollo-angular';
import { ApolloConfigModule } from './apollo-config.module';

@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule
  ],
  exports: [
    ApolloConfigModule // Apollo will be injected in all module who import app module
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }