Running the first container

Before we start, we want to make sure that Docker is installed correctly on your system and ready to accept your commands. Open a new Terminal window and type in the following command:

$ docker version

If you are using Docker Toolbox then use the Docker Quickstart Terminal that has been installed with the Toolbox, instead of the Terminal on macOS or Powershell on Windows.

If everything works correctly, you should see the version of Docker client and server installed on your laptop output in the Terminal. At the time of writing, it looks like this (shortened for readability):

Client: Docker Engine - Community
 Version: 19.03.0-beta3
 API version: 1.40
 Go version: go1.12.4
 Git commit: c55e026
 Built: Thu Apr 25 19:05:38 2019
 OS/Arch: darwin/amd64
 Experimental: false

Server: Docker Engine - Community
 Engine:
 Version: 19.03.0-beta3
 API version: 1...