docs: added new troubleshooting sections (#4571)

* docs: added troubleshooting section for EADDRINUSE

* added custom hooks troubleshooting

* fix tab issues

* fix double active items in sidebar

* Update sidebars.js

www/docs/sidebars.js

@@ -361,6 +361,11 @@ module.exports = {
           type: "category",
           label: "Medusa Backend Errors",
           items: [
+            {
+              type: "doc",
+              id: "troubleshooting/eaddrinuse",
+              label: "EADDRINUSE Error",
+            },
             {
               type: "doc",
               id: "troubleshooting/database-error",
@@ -403,6 +408,11 @@ module.exports = {
               id: "troubleshooting/signing-in-to-admin",
               label: "Signing in to the Admin Dashboard",
             },
+            {
+              type: "doc",
+              id: "troubleshooting/custom-hooks-error",
+              label: "Custom Hooks Error",
+            },
           ],
         },
         {