Since we will be using the run command a lot, we should take a look at that now. You have already used the run command in its most basic form:

# new syntax
# Usage: docker container run [OPTIONS] IMAGE [COMMAND] [ARG...]
docker container run hello-world

# old syntax
docker run hello-world

This command tells Docker that you want to run a container based on the image described as hello-world. You may be asking yourself, did the hello-world container image get installed when I installed Docker? The answer is no. The docker run command will look at the local container image cache to see whether there is a container image that matches the description of the requested container. If there is, Docker will run the container from the cached image. If the desired container image is not found in the cache, Docker will reach out to a Docker registry to try to download the...