I'm not sure if it's just me but your log in with Google isn't working for me. I put a breakpoint in your function that handles failures there and it has {"response: {error: "popup_closed_by_user"}} - but I just clicked my Google account as I usually would so I'm not sure why it's saying that. Sign up by Email worked fine anyway but figured I'd let you know in case it's affecting others.
I was quite surprised how many languages you support after logging in, it might be worth adding a list/some highlights somewhere on the marketing side because I think it'd a big advantage. If you're taking requests for one more, Elixir would be great!
I'm not sure if this is your site but the "How do scrolling and steps work in the Leaf codebase?" tutorial links to https://outofthebot.me/howdoscrolling-i4owsa28 which has an SSL error. Switching to http is a 404.