This is a guide on how Apollo GraphOS's monorepo is deployed using CircleCI, a continuous integration provider. The team used dynamic workflows to build and deploy their applications, leveraging features such as Mustache templating and FYAML to generate workflow configurations. They also implemented a system for detecting changes in the codebase, generating workflows based on those changes, and deploying to staging and production environments. The deployment process includes automated tests, deployment scripts, and reminders for promoting builds to production. The team has released their CircleCI orb, `platform-internal-orb`, which contains jobs and commands that can be used by others.