Here are the ways to provide feedback.
Provide feedback on individual page
If you want to provide feedback on a particular page, use "File Issue" link to open a GitHub issue for that page.
Open GitHub issue
You can open GitHub issue for the project in general.
Send me an e-mail
You can send me an e-mail to email@example.com
Send me a message
You can send me a quick message. Note: I won't be able to reply unless you also include your e-mail address.