Looks like a bit of HN was too much for my web host to handle (investigating). In the meantime, here's the note that I wrote the update in and copy/pasted to the blog: https://public.amplenote.com/4wdQRLmYVU6wAHo1V9yKgaJK
According to the chat rep at Porkbun (the web host for this site), "it appears the site may have received spam complaints." Which I think is their way of saying they can't handle this much traffic. Actively working all possible angles to get the blog restored with them, but this backup version seems to be holding up so far.