You have successfully run a container in the previous section. Now we want to investigate in detail what exactly happened and why. Let's look again at the command we used:
$ docker container run alpine echo "Hello World"
This command contains multiple parts. First and foremost, we have the word docker. This is the name of the Docker command-line interface (CLI), which we are using to interact with the Docker engine that is responsible to run containers. Next, we have the word container, which indicates the context we are working with. As we want to run a container, our context is the word container. Next is the actual command we want to execute in the given context, which is run.
Let me recap—so ...
