The 14 errors you will hit deploying Rails with Kamal on Hetzner behind Cloudflare (and the fix for each)

I run every one of my side projects the same way: a Rails 8 app, a €4/month Hetzner box, Kamal 2, Cloudflare in front. It's cheap and it works. But the first deploy of every new project costs me an evening, and it's almost always one of the same 14 mistakes. Here they are, with the fix for each, in the order you'll probably hit them. 1. hcloud:...