Out of curiosity was your static site running under https?
You mentioned no server side code so I’m assuming you hadn’t provisioned a server yourself and it’s hosted elsewhere. As such I was wondering if wherever your hosting supported https or if this was a simple mockup on a http page. I’m assuming the communication to your webtask was https but I’d like to think the whole site was
Interesting article though. I’d used lambda before but webtask looks like an ideal tool for prototyping and even more