* initialisation of all libraries

feature: #1

src/router/index.js

@@ -12,10 +12,13 @@ const router = createRouter({
     {
       path: '/about',
       name: 'about',
-      // route level code-splitting
-      // this generates a separate chunk (About.[hash].js) for this route
-      // which is lazy-loaded when the route is visited.
+      // this page is lazy-loaded when the route is visited.
       component: () => import('../views/AboutView.vue')
+    },
+    {
+      path: '/:pathMatch(.*)*',
+      name: 'notfound',
+      component: () => import('../components/PageNotFound.vue')
     }
   ]
 })