Описание тега docker-image
A Docker image is an inert, immutable, file that's essentially a snapshot of a Linux container. Images are created with the 'docker build' command or 'docker container' command. Images will produce a container when started with 'docker run'. Images are stored in a Docker registry such as registry.hub.docker.com
A docker image is a lightweight, stand-alone, executable package of a piece of software that includes everything needed to run it: code, runtime, system tools, system libraries, settings. Available for both Linux and Windows based apps, containerized software will always run the same, regardless of the environment.