feat(demo): add landing page with docs (#1951)

docs/app/pages/pages-routing.module.ts

@@ -0,0 +1,30 @@
+import { RouterModule, Routes } from '@angular/router';
+import { NgModule } from '@angular/core';
+
+import { PagesComponent } from './pages.component';
+
+const routes: Routes = [{
+  path: '',
+  component: PagesComponent,
+  children: [
+    {
+      path: '',
+      loadChildren: './home/landing-home.module#LandingHomeModule',
+    },
+    {
+      path: 'docs',
+      loadChildren: './docs/landing-docs.module#LandingDocsModule',
+    },
+    {
+      path: '**',
+      redirectTo: '',
+    },
+  ],
+}];
+
+@NgModule({
+  imports: [RouterModule.forChild(routes)],
+  exports: [RouterModule],
+})
+export class PagesRoutingModule {
+}