@jonasgroendahl @Netlify Great!
If a little reference is helpful, I use them here: https://github.com/philhawksworth/jamstack-comments-engine/blob/master/src/lambda/comment-handler.js
And a little more info where to set them in the admin, and also some handy built-in environment variables can be found here:
https://www.netlify.com/docs/continuous-deployment/#build-environment-variables
My tweets and posts live here on my own domain these days.
You can explore them here and follow me on Mastodon instead of Twitter where I'm not currently active.