An overview of Docker

Docker is an open source container platform that enables developers to build, package, ship, and run containers. Docker is written in the Go programming language and uses the Linux operating system’s kernel namespace feature to provide isolation between different containers. Each container is a workspace in a different namespace as a means of ensuring isolation.

Docker allows us to package an application’s source code and its dependencies together in the form of an image, which is then used to run an instance of the application on a container. You can run as many instances as you want using the same image file; all of them will be created identically using the same versions of the packaged dependencies and runtime. So, when your application moves from the development to the QA environment, an application instance is created and deployed the same way.

To work with Docker, you don’t need a full-fledged operating system – Docker...