Added README file

README.md

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+# Realtime Chat App with Node.js and WebSockets
+
+## Overview
+
+This Realtime Chat App is a simple yet powerful application built with Node.js and WebSockets, allowing users to join different chat rooms and communicate with each other in real-time.
+
+## Features
+
+- **Real-time Communication:** Utilizes WebSockets to enable instant messaging between users.
+- **Multiple Rooms:** Users can join different chat rooms.
+- **User-friendly Interface:** Provides an intuitive and clean user interface for an enjoyable chat experience.
+
+## Prerequisites
+
+Before running the application, make sure you have the following installed:
+
+- Node.js: [Download and install Node.js](https://nodejs.org/)
+
+## Getting Started
+
+1. Clone the repository:
+
+   ```bash
+   git clone https://github.com/your-username/realtime-chat-app.git
+   ```
+
+2. Navigate to the project directory:
+
+```bash
+cd realtime-nodejs-chat-app
+```
+3. Install dependencies:
+
+```bash
+npm install
+```
+4. Start the server:
+```bash
+nodemon src/index.js or node src/index.js
+```
+5. Open your web browser and go to http://localhost:3000 to access the Realtime Chat App.
+
+## Usage
+1. Enter a username.
+2. Choose a chat room to join.
+3. Start chatting with other users in real-time.
+
+## File Structure
+- **src/index.js**: The main server file that handles WebSocket connections and serves the HTML page.
+- **public/index.html**: The HTML template for the chat application.
+- **public/style.css**: The stylesheet for styling the chat application.
+
+## Dependencies
+- `express`: Web framework for Node.js.
+- `socket.io`: WebSocket library for Node.js.
+
+## Contributing
+Feel free to contribute to the development of this Realtime Chat App by creating issues or submitting pull requests. Your feedback and contributions are highly appreciated!