This document provides an overview of Docker's growth and ecosystem over the past 15 months since its launch in March 2013. It highlights the large community of over 460 contributors and 250+ meetup groups, along with over 2.75 million downloads and 6,700 projects on GitHub using Docker. The document also thanks the individuals and projects that helped make Docker possible, including various open source projects, as well as some of the early adopter users and partners helping to build the Docker ecosystem.