Since its first release in 2013, Docker has quickly become one of the hottest topics in software development, and has been adopted by both large and small companies across the world. That said, there are plenty of developers who have never gotten a chance to use Docker, or been exposed to it enough to understand its benefits. In this article, I wrote for Javascript January, I walked through building a Node/Express app with Docker, and offer up a small example project to help beginners get started.