Evaluate how best to bootstrap a linux/docker host for these labs

[christian-posta]

the interconnect router runs only on linux (centos/RHEL preferred). the last 3 labs for the interconnect router kind of expect docker since it's super easy to package our lab content with docker. the problem is, it's not common for attendees to have either linux or docker VMs on their machines. would be nice to explore some cloud-based solutions for linux VMs that we can remote desktop into or something for the labs