Quip has a great interface for documentation/instructions and easily leaving comments, would highly recommend it. https://quip.com/ https://quip.com/ Disclaim

Quip has a great interface for documentation/instructions and easily leaving comments, would highly recommend it. https://quip.com/ https://quip.com/ Disclaimer: Nothing to do with them, just at a company that uses it and finds it very good at this part of docs