[docs] Add top level readme

Author: sidpalas

01-cloud-and-iac/README.md

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+This module doesn't have any corresponding code.

01-prerequisites/README.md 02-overview/README.md01-prerequisites/README.md renamed to 02-overview/README.md

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+# DevOps Directive Terraform Course
+
+This is the companion repo to the complete Terraform course from DevOps Directive (https://www.youtube.com/c/DevOpsDirective)
+
+*Note:* The videos for the course have not been released yet... stay tuned!
+
+## 01 - Evolution of Cloud + Infrastructure as Code
+
+High level overview of the evolution of cloud computing and infrastructure as code.
+
+This module does not have any corresponding code.
+
+## 02 - Overview
+
+Terraform overview and setup instructions.
+
+Includes super basic `hello world` terraform config to provision a single AWS EC2 instance.
+
+## 03 - Basics
+
+Covers main usage pattern, setting up remote backends (where the terraform state is stored) using terraform Cloud and AWS, and provides a naive implementation of a web application architecture.
+
+## 04 - Variables and Outputs
+
+Introduces the concepts of variables which enable Terraform configurations to be flexible and composable. Refactors web application to use these features.
+
+## 05 - Language Features
+
+Describes additional features of the Hashicorp Programming Language.
+
+## 06 - Organization and Modules
+
+Demonstrates how to structure terraform code into reuseable modules and how to instantiate/configure modules.
+
+## 07 - Managing Multiple Environments
+
+Shows two methods for managing multiple environments (e.g. dev/staging/prodution) with Terraform.
+
+## 08 - Testing
+
+Explains different types of testing (manual + automated) for Terraform modules and configurations.
+
+## 09 - Developer Workflows + CI/CD
+
+Covers how teams can work together with Terraform and how to set up CI/CD pipelines to keep infrastructure environments up to date.