Update README.md

Add backlink to https://medusajs.com/nextjs-commerce/

Author: MedusaNick

README.md

@@ -28,7 +28,7 @@ Combine Medusa's modules for your commerce backend with the newest Next.js 13 fe
 </p>
 
 ### Prerequisites
-To use the starter you should have a Medusa server running locally on port 9000.
+To use the [Next.js Starter Template](https://medusajs.com/nextjs-commerce/), you should have a Medusa server running locally on port 9000.
 For a quick setup, run: 
 ```shell
 npx create-medusa-app@latest