ng g module routing --spec false --module app

in routing.module.ts

import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { Routes, RouterModule } from '@angular/router';
import { HomeComponent } from '../home/home.component';
 
const routes: Routes = [
  { path: 'home', component: HomeComponent},
  { path: '', redirectTo: '/home', pathMatch: 'full' }
 
];
 
@NgModule({
  imports: [
    CommonModule,
    RouterModule.forRoot(routes)
  ],
  exports: [
    RouterModule
  ],
  declarations: []
})
export class RoutingModule { }

=======================
app.component.html

<app-layout>
  <main>
    <router-outlet></router-outlet>
  </main>
</app-layout>