Update prerequisites section in README

Consolidate prerequisites section in README.

Author: sergey-shandar

README.md

@@ -2,12 +2,10 @@
 
 See [file-server-example.onrender.com](https://file-server-example.onrender.com/).
 
-## Prerequisites
-
-- [Node.js](https://nodejs.org/) version 24 or higher.
-
 ## Run Locally
 
+**Prerequisites** [Node.js](https://nodejs.org/) version 24 or higher.
+
 1. Install dependencies:
    ```sh
    npm ci