docker:tldr:c84ca

The command "docker pull ${image}" is used to download a Docker image from a Docker Registry. Here's a breakdown of the command:

• "docker pull" is the command used to fetch an image or a repository from a registry.
• "${image}" is a variable that represents the name or ID of the image you want to download. It is typically in the format "registry/repository:tag", where "registry" is an optional domain name or IP address of the Docker Registry, "repository" is the name of the repository or namespace in the registry, and "tag" represents a specific version or tag of the image. The variable is used here allowing the user to specify the image they want to pull at runtime by providing the value of the variable.

When you execute this command, Docker will connect to the default registry (Docker Hub) or the specified registry, if provided, and download the requested image or repository. Once pulled, the image will be stored locally on your machine, allowing you to run containers using that image.