‘Try on Desktop’ Button for Docker Hub
blog.docker.com
blog.docker.com
The cross compile environment can then either be started via a Makefile, or you can run it interactively if you want to use gdbserver or something. Also makes it easy to have a build server compile the binaries on a code push.
Container technology (and the Linux namespaces behind it) support the ability to run containers as non-root by translating the user with a namespace.
All of the WordPress images available via Kitematic's search failed to work, which is a pity because it would have been the most immediately useful application for the greatest number of users. I don't know of many people actually using the much-hyped Ghost blogging platform.