Docker images are the fundamental building blocks of containers. These images could be very basic operating environments such, as alpine or Ubuntu. Or, the images could craft advanced application stacks for the enterprise and cloud IT environments. An automated approach of crafting Docker images is using a Dockerfile.

A Dockerfile is a text-based build script that contains special instructions in a sequence for building the right and the relevant images from the base images. The sequential instructions inside the Dockerfile can include the base image selection, installing the required application, adding the configuration and the data files, and automatically running the services as well as exposing those services to the external world. Thus, a Dockerfile-based automated build system has remarkably simplified the image-building process. It also offers a great deal of flexibility in the way in which the build instructions are organized and in the way in which they visualize the...