feat(dashboard,admin-vite-plugin,admin-bundler,admin-sdk): Rework admin extensions and introduce custom fields API (#9338)

packages/medusa/src/loaders/admin.ts

@@ -1,3 +1,4 @@
+import { logger } from "@medusajs/framework/logger"
 import { AdminOptions, ConfigModule } from "@medusajs/framework/types"
 import { Express } from "express"
 import fs from "fs"
@@ -16,6 +17,8 @@ type IntializedOptions = Required<
     sources?: string[]
   }
 
+const NOT_ALLOWED_PATHS = ["/auth", "/store", "/admin"]
+
 export default async function adminLoader({
   app,
   configModule,
@@ -44,6 +47,14 @@ export default async function adminLoader({
     return app
   }
 
+  if (NOT_ALLOWED_PATHS.includes(adminOptions.path)) {
+    logger.error(
+      `The 'admin.path' in 'medusa-config.js' is set to a value that is not allowed. This can prevent your server from working correctly. Please set 'admin.path' to a value that is not one of the following: ${NOT_ALLOWED_PATHS.join(
+        ", "
+      )}.`
+    )
+  }
+
   if (process.env.NODE_ENV === "development") {
     return initDevelopmentServer(app, adminOptions)
   }