feat: add not found component (#327)

Fixes #110

src/app/app-routing.module.ts

@@ -2,14 +2,16 @@
 import { NgModule } from '@angular/core';
 import { Routes, RouterModule } from '@angular/router';
 
+// Not Found Component
+import {NotFoundComponent} from './not-found/not-found.component';
+
 /**
  * Fallback to this route when no prior route is matched.
  */
 const routes: Routes = [
   {
     path: '**',
-    redirectTo: '',
-    pathMatch: 'full'
+    component: NotFoundComponent
   }
 ];