Improvement in the existing markdown

[piyush-sri]

Markdown can be improved with contribution guidelines and how to up and run this app on localmachine

[Gagandeep-2003]

To run the application you can follow following steps:-

1. clone this to repository to your local machine or download the zip file.
2. open in code editor.
3. open the project directory that you wanted to run.
4. use gitbash or terminal and cd the directory of opened project.
5. install the node modules using - (npm install) command.
6. Run it using npm start command.
7. You can open the project in the browser using localhost:3000.