first commit

web/pages/exception/404.tsx

@@ -0,0 +1,16 @@
+import React from 'react';
+import {Button, Card, Result} from 'antd';
+
+const App: React.FC = () => (
+  <Card variant={"borderless"}>
+    <Result
+      status="404"
+      title="404"
+      subTitle="Sorry, the page you visited does not exist."
+      extra={<Button type="primary">Back Home</Button>}
+    />
+  </Card>
+
+);
+
+export default App;