moved configurations page

www/apps/book/sidebar.mjs

@@ -534,6 +534,11 @@ export const sidebars = [
             title: "Environment Variables",
             path: "/learn/fundamentals/environment-variables",
           },
+          {
+            type: "link",
+            title: "Medusa Configuations",
+            path: "/learn/configurations/medusa-config",
+          },
           {
             type: "link",
             title: "Type Aliases",