Update in the README.md file

[ayushman1210]

I noticed that the repository already includes a docker-compose.yml, which makes running the site locally very simple. To help new users and contributors get started more easily, we could add a small documented section in the README with run/build instructions.

 Run locally (Docker)
docker-compose up --build
 or
docker build -t iyp-website . && docker run -p 8080:80 iyp-website

please let me know should i add this and make a pr
thanks !!