update to angular 11

src/app/app-routing.module.ts

@@ -5,7 +5,7 @@ import { Routes, RouterModule } from '@angular/router';
 const routes: Routes = [];
 
 @NgModule({
-  imports: [RouterModule.forRoot(routes)],
+  imports: [RouterModule.forRoot(routes, { relativeLinkResolution: 'legacy' })],
   exports: [RouterModule]
 })
 export class AppRoutingModule { }