readme update for installation of app

Author: followDev

README.md

@@ -1,4 +1,48 @@
 # ChatGPT clone using OpenAI API
+This clone is made with React and Node and uses OpenAI API.
+
+- get your api key from  https://openai.com/api/
+
+## Prerequisites
+Make sure you have installed all of the following prerequisites on your development machine:
+* Git - [Download & Install Git](https://git-scm.com/downloads). OSX and Linux machines typically have this already installed.
+* Node.js - [Download & Install Node.js](https://nodejs.org/en/download/) and the npm package manager. If you encounter any problems, you can also use this [GitHub Gist](https://gist.github.com/isaacs/579814) to install Node.js.
+
+## Environment variables setup example
+```
+OPENAI_API_KEY = YOU_API_KEY_HERE
+MONGO_URI = mongodb://0.0.0.0:27017/chatGPT
+```
+
+
+## Cloning The GitHub Repository
+The recommended way to get ChatGPT clone is to use git to directly clone the repository:
+
+```bash
+$ git clone https://github.com/nisabmohd/ChatGPT.git
+```
+
+## Running Your Application
+
+open terminal/bash in this repo and enter below commands to start the application
+
+→ To start the server
+```bash
+$ node server
+```
+
+→ To start the client app
+```bash
+$ cd client
+$ npm run dev
+```
+
+
+
+* Your client application should run on port 3000 with the *development* environment configuration, so in your browser just go to [http://localhost:5173](http://localhost:5173)
+
+* Your server application should run on port 8000, so in your browser just go to [http://localhost:8000](http://localhost:3000)
+
 
 <img width="100%" src="img/home.png" />
 <img width="100%" src="img/chat.png" />