Hi Owen,
Matt from SkySilk here. Our beta platform does not currently offer Docker support, though it is something we are working to add soon. Once that happens we will be able to support both self-installs and custom built SkySilk Discourse templates. This will most likely happen once we move out of beta and start offering paid infrastructure alongside our free offering.
Additionally, just confirming we do use KVM and our Virtual Machines are container-based, meaning the kernel version cannot be updated at this time. Similar to Docker and Discourse, we will update all users if/when we add additional functionality that has to do with Kernel updates.
Regards,
-Matt