Continuous delivery focuses on securely, quickly, and consistently deploying application changes to production, and Pulumi's infrastructure as code approach facilitates this by modeling cloud resources with source code. This allows infrastructure code to undergo the same processes as application code, such as testing and code reviews, and to integrate into any CI/CD system, with Octopus Deploy serving as a deployment automation server example. Octopus Deploy integrates with existing build pipelines and can manage deployments across different environments, such as Development, Test, and Production, with specific access rights for various team members. The Pulumi guide provides a detailed walkthrough for deploying a Python Flask application on AWS Fargate using Octopus Deploy, highlighting the creation of Pulumi stacks corresponding to Octopus environments and detailing the steps required to package and deploy Pulumi applications through Octopus, including using community templates and setting configuration parameters. This process exemplifies how continuous delivery can be streamlined using CI/CD systems and deployment automation tools like Octopus Deploy.