What Windows ISOs does Hetzner provide? I guess that’ll determine what licence key to buy.
Ant shared this site on LES a couple weeks back where you can pick up OEM Windows keys. For example, here’s the Server 2019 Standard key -
It’s about 20 bucks and you can take an extra 30% off with promo code: BFTYC
Site seems to be legit - We CALLED Microsoft to Check if $12 Windows 10 PRO Keys are LEGIT... - YouTube