It's an interesting thing to see this technology/service require Docker running on Hyper-V. So the software is bound to a #2 Hyper-visor in the world severely limiting its portability?
Is there a plan within #ESRI to make this flexible enough to run on ANY Docker compliant/compatible platform?
Just wanted to add some clarification on this. Notebook server does indeed require Docker however Hyper-V is not always required. Notebook server runs on Linux containers and (Docker...along with notebook server) can be setup on a Linux machine which will not need Hyper-V. I have linked below Notebook Server's system requirements. Inside you will see the various options whether it be windows vs Linux, various requirements, or cloud implementation options.