Routing through a Floating IP on Hetzner Cloud

How to route outgoing traffic through a Floating IP in Hetzner Cloud.

Hetzner DE Firewall and External DNS

I'm sure you've used a Hetzner DE server before. Their pricing is great, the servers work well, and their cloud prices are incredible! But if you get a bare-metal server, like one of the AMD AX-line servers (https://www.hetzner.com/dedicated-rootserver/matrix-ax) you might want