Updates to the example site config

- Open Graph and Twitter Card images
- Enable on page navigation
- formtting

examples/basics/siteConfig.js

@@ -79,14 +79,21 @@ const siteConfig = {
     theme: 'default',
   },
 
-  scripts: ['https://buttons.github.io/buttons.js'],
+  // Add custom scripts here that would be placed in <script> tags
+  scripts: [
+    'https://buttons.github.io/buttons.js'
+  ],
 
+  /* On page navigation for the current documentation page */
+  onPageNav: 'separate',
+  
+  /* Open Graph and Twitter card images */
+  ogImage: 'img/docusaurus.png',
+  twitterImage: 'img/docusaurus.png',
+  
   // You may provide arbitrary config keys to be used as needed by your
   // template. For example, if you need your repo's URL...
   //   repoUrl: 'https://github.com/facebook/test-site',
-
-  /* On page navigation for the current documentation page */
-  // onPageNav: 'separate',
 };
 
 module.exports = siteConfig;