This guide teaches how to build observability as code infrastructure automation using New Relic, Terraform Cloud, and Google's 4 Golden Signals of SRE. It covers setting up Terraform Cloud, provisioning an alert policy, creating four alert conditions based on the Four Golden Signals (latency, traffic, errors, and saturation), and configuring a notification channel to ensure proper folks get notified when an alert triggers. The guide also discusses how to maintain infrastructure code with a version control system, deploy changes safely and securely, and manage teams with Terraform Cloud. Additionally, it provides information on various approaches to building a CI/CD pipeline with GitHub and Terraform Cloud and recommended practices for evolving provisioning practices.