A Dockerfile is a configuration file which describes the docker runtime on how to build a customized image from an existing base image and how to get things started. It is useful in building exportable containers for applications which can later be used in creating and deploying containerized nodes.

To get started in the world of docker way of application deployment, we require to get ourselves familiar with a few commands which do jobs like starting, running and terminating a "container" along with commands which help in monitoring the containers and executing commands over them.