That link says "Known to work on Ubuntu 18.04, 20.04, and 21.04", although maybe Ubuntu is just the default selection when the page loads... still, I guess you

That link says "Known to work on Ubuntu 18.04, 20.04, and 21.04", although maybe Ubuntu is just the default selection when the page loads... still, I guess you won't be testing much new software if they don't allow you even using Docker!