Enable secondary page navigation

Summary: Allows for easier navigation through pages with multiple sections.

Reviewed By: danielbuechele

Differential Revision: D9811408

fbshipit-source-id: f47ad9d650dd4bd79710f64e4bb4485f3d4c4323

website/siteConfig.js

@@ -35,6 +35,7 @@ const siteConfig = {
   repoUrl,
   scripts: ['https://buttons.github.io/buttons.js'],
   stylesheets: [],
+  onPageNav: 'separate',
 };
 
 module.exports = siteConfig;