[Document] Write Rails Guide about Deployment?

Can you guys write a new guide about the Basic of Rails Deployment?
I can’t find any on http://guides.rubyonrails.org/

I know there are many tutorial on Google.
but I hope just official guide can have a short intro about how many web server there are,
like puma, unicorn, passanger, rainbow…, maybe a bit of history, like Mongrel
and thing like that.

Would that be nice?