Node.js microservice deployment with Docker

Docker (http://docker.com) is the new attraction in the software industry. Interest is taking off like crazy, spawning many projects, often with names containing puns around shipping containers.

It is described as an open platform for distributed applications for developers and sysadmins. It is designed around Linux containerization technology and focuses on describing the configuration of software on any variant of Linux.

Docker automates the application deployment within software containers. The basic concepts of Linux containers date back to chroot jail's first implementation in the 1970s, and other systems such as Solaris Zones. The Docker implementation creates a layer of software isolation and virtualization based on Linux cgroups, kernel namespaces, and union-capable filesystems, which blend together to make Docker what it is. That was some heavy geek-speak, so let's try a simpler explanation.

A Docker container is a running instantiation of...