How did I migrate angular7 project?

[AsimNet]

Hello,
how do I migrate our angular7 project to ionic4?
simply by calling:

$ ionic init
$ npm install @ionic/angular

then I imported the following to app.module.ts:

import { IonicModule, IonicRouteStrategy } from '@ionic/angular';
import { RouteReuseStrategy } from '@angular/router';

then in imports array:

  imports: [
    .
    .
    .
    IonicModule.forRoot(),
]

and in providers:

  providers: [
    .
    .
    .
    { provide: RouteReuseStrategy, useClass: IonicRouteStrategy },
]

then
$ ionic serve --project=YOUR_PROJECT_NAME --configuration=YOUR_ENVIRONMENT_NAME