docs: small fixes in next.js storefront guide (#4256)

docs/content/starters/nextjs-medusa-starter.mdx

@@ -56,12 +56,6 @@ You can install Node from the [official website](https://nodejs.org/en/).
 
 ## Installation
 
-:::tip
-
-It is recommended to use [Yarn](https://yarnpkg.com/getting-started/install) for the installation process as it's much faster than using NPM.
-
-:::
-
 1\. Create a new Next.js project using the [Medusa starter template](https://github.com/medusajs/nextjs-starter-medusa):
 
 ```bash
@@ -77,11 +71,11 @@ mv .env.template .env.local
 
 3\. Make sure the Medusa backend is running, then run the local Next.js server:
 
-```bash
+```bash npm2yarn
 npm run dev
 ```
 
-Your Next.js storefront is now running at `localhost:8000`!
+Your Next.js storefront is now running at `localhost:8000`
 
 <Feedback 
    event="survey_nextjs_quickstart"