pre-requisites too over the top, pepper the recommended key concepts where they are likely used

Signed-off-by: Peter Macdonald <macdonald.peter90@gmail.com>

docs/getting-started/index.md

@@ -7,6 +7,10 @@ description: How to install Backstage for your own use.
 
 Audience: Developers and Admins
 
+:::note Note
+It is not required, although recommended to have a basic understanding of [Yarn](https://www.pluralsight.com/guides/yarn-a-package-manager-for-node-js) and [npm](https://docs.npmjs.com/about-npm) before starting this guide.
+:::
+
 ## Summary
 
 This guide walks through how to get started creating your very own Backstage customizable app. This is the first step in evaluating, developing on, or demoing Backstage.
@@ -21,21 +25,6 @@ If you are planning to contribute a new feature or bug fix to the Backstage proj
 
 ## Prerequisites
 
-Before we dive in, its good to have an understanding of these concepts which are central to Backstage's
-design and functionality. Being an expert in each of these concepts is not
-necessary, however having a base understanding of each will make administering, developing,
-configuring, and operating Backstage easier.
-
-- CHANGELOG - https://keepachangelog.com
-- Docker - https://www.docker.com/
-- Monorepo - https://semaphoreci.com/blog/what-is-monorepo
-- Node.js - https://nodejs.org
-- React - https://reactjs.org
-- Semantic Versioning - https://semver.org
-- TypeScript - https://www.typescriptlang.org
-- YAML - https://yaml.org
-- Yarn - https://www.pluralsight.com/guides/yarn-a-package-manager-for-node-js
-
 This guide also assumes a basic understanding of working on a Linux based operating system and have some experience with the terminal, specifically, these commands: `npm`, `yarn`.
 
 - Access to a Unix-based operating system, such as Linux, macOS or