feat: able to add more UI theme (#860)

web/default/src/pages/NotFound/index.js

@@ -0,0 +1,13 @@
+import React from 'react';
+import { Message } from 'semantic-ui-react';
+
+const NotFound = () => (
+  <>
+    <Message negative>
+      <Message.Header>页面不存在</Message.Header>
+      <p>请检查你的浏览器地址是否正确</p>
+    </Message>
+  </>
+);
+
+export default NotFound;