Docker's Solution to Slimmer Containers
One such distribution is Alpine Linux. Alpine is a very minimal distro, weighing in at only 4.8MB. Although it's tiny, it's able to support a wide range of the applications and services that comprise a modern cloud app.
Docker is switching to Alpine as its default OS image. The reduced size will reduce its network traffic massively, and it means smaller and faster containers for cloud applications.
Docker's future may well lie in the direction of Unikernels, but they are a very new technology, and they require a change of perspective for developers. With Alpine images, programmers still can work with a complete (but minimal) Linux system.