add（主页，路由）：添加主页页面和404页面

src/router/index.js

@@ -3,7 +3,7 @@ import VueRouter from 'vue-router'
 import HomeView from '../views/HomeView.vue'
 import Login from '@/views/auth/Login.vue'
 import Register from '@/views/auth/Register.vue'
-
+import Notfound from '@/views/Notfound.vue'
 Vue.use(VueRouter)
 
 const routes = [
@@ -80,6 +80,11 @@ const routes = [
         }
       },
     ]
+  },
+  {
+    path: '*',
+    name: 'NotFound',
+    component: Notfound
   }
 ]