How do I install an Ubuntu 20.04 Server image?

[mitchmitch]

I have a TD-453D and need to run an Ubuntu Server (20.04 or more recent) on it. Unfortunately the Ubuntu Linux Station only provides Desktop images, and the Container Station only provides *ancient* Ubuntu images (<18.04!). 

How do I go about getting a modern Ubuntu Server running in a container / vm / docker, on the Qnap? 

[FSC830]

Install virtualization station and create a VM.

Regards