docs: adds a note about installing direnv and devbox

docs/developer_workflow.md

@@ -1,15 +1,13 @@
 # Developer workflow
 
-This document outlines how to
+## Prerequisites
 
-## Build the source code
+This project requires the following to be installed on the developer's workstation.
 
-Download source code:
+1. [devbox](https://www.jetpack.io/devbox/docs/installing_devbox/)
+1. [direnv](https://direnv.net/docs/installation.html)
 
-    ```shell
-    git clone https://github.com/nutanix-cloud-native/cluster-api-provider-nutanix.git
-    cd cluster-api-provider-nutanix
-    ```
+To install the required packages, please follow the directions provided for your system.
 
 ## Build source code
 <pre>