Simple instruction proving statefulset data in place

[muratkars]

Update page to add simple "Hello World" section, goal is to get started as quick as possible and validate statefulset data is in place.

Additonaly, a quick Katacoda training might be useful.

Captured the feedback from a community user Kelly Sonderegger below:

Just a comment on the documentation. It seems to me like it needs a "Hello World". What do I mean by that? A proof of storage. How do I go from setup to proving that I have statefulset data in place? Unless I'm missing something I don't think I really see that in these documents

I have used both in my cluster, I thought I had things going in the past, set up a statefulset that appeared to be storing data. But it wasn't

So it really seems like that nice assurance that my storage is actually working with a hello world statefulset would be nice