Containers gave birth to more advanced server-side architectures and sophisticated deployment techniques. Containers nowadays are so widespread that there is already a bunch of standard-alike specifications (1, 2, 3, 4, ...) describing different aspects of the containers universe. Of course, on the lowest level lie Linux primitives such as namespaces and cgroups. But containerization software is already so massive that it would be barely possible to implement it without its own concern separation layers. What I'm trying to achieve in this ongoing effort is to guide myself starting from the lowest layers to the topmost ones, having as much practice (code, installation, configuration, integration, etc) and, of course, fun as possible. The content of this page is going to be changing over time, reflecting my understanding of the topic.