Rename testpages.js to _testpages.js

src/pages/_testpages.js

@@ -0,0 +1,14 @@
+import React from 'react';
+import Layout from '@theme/Layout';
+
+export default function main() {
+    console.log("Hello World!"+navigator.UserAgent);
+  return (
+    <Layout>
+      <h1>My React page</h1>
+      <p>This is a React page</p>
+      <p></p>
+    </Layout>
+
+  );
+}