Revert "Add .gitignore file"

This reverts commit 945454febde598e34a575fe68b76cde47b2b24c6.
Update README.md

- add update record in ‘README.md’ file
Revert b2d5406..d798def

This rolls back to commit b2d540644302a8160e85bb731766fd46f0dc4246.