The article discusses Dokku, an open-source Platform as a Service (PaaS) that allows users to deploy applications on a single server of their choice. The author highlights the benefits of using Dokku, including its ease of use, automatic SSL certificate management, and flexibility in handling various applications. Dokku is compared to Heroku, but with the advantage of being cost-effective and self-hosted. The article also provides examples of deploying applications with Dokku, including using Docker containers and GitHub Actions.