[docs] readme zero repo alpha lx

[dtoki]

Outline of work to be done

root/

# Overview
  - [X] What is Zero

  - [X] Why Zero is good for startups

  - Why it's good for “reliable, scalable, performant and secure infrastructure”

# Getting Started

  - [X] Download & install Zero

  - [X] Install & configure zero dependencies

  - Using zero to spin up your own stack

  - Zeros' default stack summary (include infastucture diagram)

# Contributing to Zero

# Learn More

[dtoki]

@bmonkman did the team ever settle on how we are distributing the Zero bin? this would influence how the download section of the guide is worded.

Just saw the slack message.