What exactly do you mean? The Howto explains how to install Dicourse’s docker image on a Ubuntu host, but the host is pretty much exchangeable. The same instructions should work just fine on a Fedora box, as long as Docker with its dependencies is already installed.
The inside of the container should not make much of a difference. It may be based on Ubuntu, but it only takes the package management straight from Ubuntu. Everything else is either inherited from the host (i.e. kernel, filesystems, device management) or rather insignificant.