added page not found

src/Pages/PageNotFound/index.js

@@ -0,0 +1,17 @@
+import { Button, Result } from "antd";
+import { Link } from "react-router-dom";
+
+export default function PageNotFound() {
+  return (
+    <Result
+      status="404"
+      title="404"
+      subTitle="Sorry, the page you visited does not exist."
+      extra={
+        <Link to="/">
+          <Button type="primary">Back Home</Button>
+        </Link>
+      }
+    />
+  );
+}