Update 2-core-concepts.md (#846)

## Description

- [x] Remove hard hat admonition
- [ ] Add more resource to Understand the Basics page
- [ ] Formatting 

## Related Issue

Usability testing revealed that the hard hat admonition communicated to
the users that the docs were unfinished and therefore not valuable or
worth exploring.

The admonition is no longer needed. Removing should remove this barrier
observed and keep users from feeling a sense of unease and uncertainty
about the docs.

Fixes # (issue)

## Type of change

- [x] Bug fix (non-breaking change which fixes an issue)

## Checklist before merging

- [x] Documentation has been updated as necessary (add the `needs-docs`
label)

docs/1-understand-the-basics.md

@@ -2,30 +2,40 @@
 
 Before you are able to effectively use Zarf, it is useful to have an underlying understanding of the technology Zarf is built on and around. The sections below provide some helpful links to start building up this foundation as well as a glossary of the terms used in this project.
 
-:::caution Hard Hat Area
-This page is still being developed. More content will be added soon!
-:::
-
-<!-- TODO: This might be a good place to shamelessly plug the 'Air Gap' course -->
 <!-- TODO: The links and information on this page need to be expanded a lot more to really be useful -->
 
 <br />
 <br />
 
-## What is Kubernetes?
+## Fundamental Technologies
+
+### Kubernetes Basics
 
-- [Kubernetes Overview](https://kubernetes.io/docs/concepts/overview/)
+- [What is Kubernetes?](https://www.ibm.com/cloud/learn/kubernetes)
+- [Learn Kubernetes Basics](https://kubernetes.io/docs/tutorials/kubernetes-basics/)
+- [Free Introduction to Kubernetes Course](https://www.edx.org/course/introduction-to-kubernetes)
+- [Super charge your Kubernetes deployments](https://www.youtube.com/watch?v=N6UCKF7JD7k)
   <br />
   <br />
 
-## What is the 'Air Gap'?
+### AirGap Basics
+
+- [What is AirGap](https://ibm.github.io/kubernetes-networking/vpc/airgap/)
+- AirGap Kubernetes Course - Coming Soon!
 
 <br />
 <br />
 
-## What is GitOps?
+## GitOps Basics
 
 - [CloudBees GitOps Definition](https://www.cloudbees.com/gitops/what-is-gitops)
+- [Understanding Git](https://hackernoon.com/understanding-git-fcffd87c15a3)
+
+### CLI Basics
+
+- [List of CLI Commands](https://www.codecademy.com/article/command-line-commands)
+- [How to use the Command Line](https://training.linuxfoundation.org/training/linux-tools-for-software-development-lfd108x/)
+- [Free Linux tools for Software Development Course](https://training.linuxfoundation.org/training/linux-tools-for-software-development-lfd108x/)
 
 ## Terms Used
 

docs/2-core-concepts.md

@@ -1,11 +1,9 @@
 # Core Concepts
 
-:::caution Hard Hat Area
-This page is still being developed. More content will be added soon!
-:::
-
 Now, assuming you're familiar with Kubernetes, the AirGap, and GitOps from [Understanding the Basics](./1-understand-the-basics.md), we can get started on the core concepts of Zarf.
 
+##Zarf Concepts
+
 - [**Zarf Package**](./4-user-guide/2-zarf-packages/1-zarf-packages.md) - A binary file that contains the instructions and dependencies necessary to install an application on a system.
 - [**Zarf Component**](./4-user-guide/2-zarf-packages/2-zarf-components.md) - A set of defined functionality and resources that build up a package.
 - [**Zarf Init Package**](./4-user-guide/2-zarf-packages/3-the-zarf-init-package.md) - The initial package that lays the groundwork for other packages.