What is the difference between a Docker image and a Docker container, and how are they related?

A Docker image is a template, a static file that contains all the dependencies, libraries, configurations, and the program itself necessary to run an application. The image is immutable and serves as the basis for creating containers.

A Docker container is a running instance of an image, an isolated environment in which the application runs. A container can be started, stopped, and its state can be changed, but changes inside the container do not affect the original image.

Relationship: an image is a 'blueprint', and a container is a 'live' process created based on that blueprint.