This document discusses using Terraform and Packer to build infrastructure as code for a virtual private cloud (VPC) in AWS. Terraform is an open source tool for defining and managing infrastructure as code across multiple cloud providers. Packer is another open source tool used to build machine images like AMIs. The document demonstrates using Terraform to define a VPC configuration and using Packer to build an Amazon Machine Image (AMI) that can be deployed within that VPC infrastructure.