Fix: add custom.js (planning#404)

docusaurus.config.js

@@ -169,4 +169,9 @@ module.exports = {
       },
     ],
   ],
+  scripts: [ {
+      src: '/js/custom.js',
+      async: false,
+    },
+  ]
 }

src/css/style.scss

@@ -78,7 +78,7 @@ img {
 }
 
 .fitko-navbar-icon--back {
-  display: inline-flex;
+  display: inline-block !important;
   padding: 0;
   position: absolute;
   left: -10px;