Docker is an environment for creating, deploying, and running applications, allowing you to deliver software to production environments using containers. Containers are self-contained applications that can be easily distributed to multiple environments for testing and quality control. Docker helps to streamline to the development life cycle and is used with continuous integration and continuous delivery workflows. In this course, you'll learn about the features and the components of the Docker environment. You'll examine the elements, features, and purpose of Docker Compose, as well as how to configure Docker Compose for multiple environments. Next, you'll explore some common use cases for Docker Compose and the steps required to upgrade older versions of Docker Compose to the latest version. Finally, you'll learn how to install Docker Compose on different operating systems.