make it better

src/containers/NotFound/index.js

@@ -0,0 +1,12 @@
+import React from 'react'
+
+export default class NotFound extends React.Component {
+  render() {
+    return (
+      <div>
+        <h1>404</h1>
+        <h3>Page not found</h3>
+      </div>
+    );
+  }
+}