How to use the portofino.PortofinoModule.withRoutes function in portofino

@Component({
  selector: 'app-root',
  template: `
    
  `
})
export class DemoTTAppComponent {}

@NgModule({
  declarations: [DemoTTAppComponent, HelloPortofino, CustomNavigation, WelcomeComponent, CustomCrud, CustomSearch],
  providers: [
    { provide: NAVIGATION_COMPONENT, useFactory: DemoTTAppModule.navigation },
  ],
  imports: [
    PortofinoModule.withRoutes([{ path: "hello", component: HelloPortofino }]), PortofinoUpstairsModule,
    BrowserModule, BrowserAnimationsModule, FlexLayoutModule, FormsModule, HttpClientModule, ReactiveFormsModule,
    MatAutocompleteModule, MatButtonModule, MatCardModule, MatCheckboxModule, MatDatepickerModule, MatDialogModule,
    MatDividerModule, MatExpansionModule, MatFormFieldModule, MatIconModule, MatInputModule, MatListModule, MatMenuModule,
    MatPaginatorModule, MatProgressBarModule, MatRadioModule, MatSelectModule, MatSidenavModule, MatSnackBarModule,
    MatSortModule, MatTableModule, MatTreeModule, MatToolbarModule, MatMomentDateModule, ScrollingModule,
    FileInputAccessorModule, NgxdModule, QuillModule.forRoot(),
    TranslateModule.forRoot()],
  entryComponents: [ CustomNavigation, WelcomeComponent, CustomCrud, CustomSearch ],
  bootstrap: [DemoTTAppComponent]
})
export class DemoTTAppModule {
  static navigation() {
    return DefaultNavigationComponent
    //return CustomNavigation
  }
}

to explore the pages.
        <p></p>
        <p>Initially, the application has the user admin/admin built in. You can use that to run the wizard, connect to your database, and build a complete application from it.</p>
        <p>The wizard can be found "upstairs", where all the configuration tools lie. The "upstairs" section is optional and can be removed or disabled in production.</p>
      
    `
})
@PortofinoComponent({ name: 'welcome' })
export class WelcomeComponent extends Page {}

@NgModule({
  declarations: [AppComponent, WelcomeComponent],
  providers: [],
  imports: [
    PortofinoModule.withRoutes([]), PortofinoUpstairsModule,
    BrowserModule, BrowserAnimationsModule, FlexLayoutModule, FormsModule, HttpClientModule, ReactiveFormsModule,
    MatAutocompleteModule, MatButtonModule, MatCheckboxModule, MatDatepickerModule, MatDialogModule, MatFormFieldModule,
    MatIconModule, MatInputModule, MatMenuModule, MatPaginatorModule, MatRadioModule, MatSelectModule, MatSidenavModule,
    MatSnackBarModule, MatSortModule, MatTableModule, MatToolbarModule, MatMomentDateModule,
    FileInputAccessorModule, QuillModule.forRoot(), TranslateModule.forRoot()],
  entryComponents: [WelcomeComponent],
  bootstrap: [AppComponent]
})
export class AppModule {}