Docker is an open-source application that provides lightweight operating-system-level virtualization through the use of containers. It is a kind of virtualization technology that is specially designed to easily develop and deploy applications inside neatly packaged virtual containerized environments. Docker containers are in essence a set of software packages that run as one application that’s isolated from others. We can deploy it to any machine without any compatibility issues. By using this, the software stays system agnostic, simpler to use, less work to develop, and easy to maintain.