style: adjsut Netlify position (#808)

Author: juzhiyuan

website/config/ssrTemplate.js

@@ -34,8 +34,8 @@ module.exports = {
     <script>
       window.onload = function() {
         if (window.location.host.endsWith(".netlify.app")) {
-          var footerDOM = document.querySelector('footer');
-          footerDOM.insertAdjacentHTML('afterend', '<div style="text-align: right;padding: 48px 0;">This site is powered by <a href="https://www.netlify.com/" target="_blank">Netlify</a></div>');
+          var dom = document.querySelector("#__docusaurus");
+          dom.insertAdjacentHTML('afterend', '<div style="text-align: right;padding: 48px 32px 48px 0;">This site is powered by <a href="https://www.netlify.com/" target="_blank">Netlify</a></div>');
         }
       }
     </script>