Using Jenkins to build Docker images

You probably already know that Jenkins is a widely-used tool for continuous integration/continuous delivery (CI/CD) systems. Virtually every company, both large and small, is using it in some capacity. It is extremely effective, and highly configurable, especially with the variety of plugins that can be used with it. So, it is very natural to expand its use to create Docker images. This first step in using Jenkins with Docker is pretty easy to accomplish. If you have an existing Jenkins server in use today, all you need to do to use it to build Docker images is to install Docker on the Jenkins server. You use the exact same installation techniques that we saw and used in Chapter 1, Setting up a Docker Development Environment. Based on the OS of the system that is running your Jenkins server, you follow the install steps you learned in Chapter...