Add documentation for Getting Started guides.
Kargo is an incubated Kubernetes project
https://github.com/kubernetes-incubator/kargo.
Signed-off-by: Bogdan Dobrelya <bogdando@mail.ru>
Quick getting started guide for kops.
Also try to provide some guidance as to when to use kops and when
kubeadm; based on discussions with sig-cluster-lifecycle that kubeadm is
a building block and not a provisioning tool.
I used "kubeadm" as a simplifying concept for "kubeadm and the other
work done by sig-cluster-lifecycle that kubeadm is a part of", in that
tools that don't (yet) use kubeadm are still leveraging the kubeadm
stream of work.
The previous link now has scary language in a big font, along with a membership requirement. That page does _mention_ kubernetes-users but it does not link to said group. This fixes both of those problems.