practice

[Hasnainbabarkhan]

This pull request sets up the foundational structure for the Node.js Hello World project.
It includes the following key changes:

Basic Node.js server setup using the Express framework.
Server is configured to listen on port 3000.
A simple route (/) responding with "Hello, World!" to verify server functionality.

Changes Made:
Installed Express as a dependency.
Added express to the project using npm install express.
Updated the package.json file with the necessary dependencies.

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