Images and Containers

An image is a read-only template, like a recipe. A container is a running instance of that image, like the meal you cooked. You can start many containers from one image.

docker pull node:20           # download an image
docker images                 # list images

docker run -it node:20 node   # start a container from it
docker ps -a                  # list all containers
docker stop my-app
docker rm my-app              # delete a container
docker rmi node:20            # delete an image