Add captcha for email contact form

[frgfm]

We've been receiving a bunch of bot emails lately, so I'd argue it's time to add a captcha validation for the email contact form!

cf. https://developers.google.com/recaptcha/docs/v3

[fe51]

Is there an issue to add captcha validation because we are using github.page (ie a static site) ?

If it is an issue, maybe we should try to see if a really simple modification to our form can significantly reduce emails bot ?
Like asking a dumb question in the form : what is 3+3 ? (and not send any email if this it not the right answer)

Might be stupid suggestion, but at least, to re open the topic :)