The document summarizes the growth of Docker over the past 3 years. It notes that DockerCon attendance grew from 500 attendees in 2014 to 5,500 in 2017. Other growth metrics highlighted include a 77,000% increase in Docker job listings, over 390,000% growth in image pulls, and 12 billion Docker apps deployed. The document discusses how Docker is now used across many industries and how the needs of stakeholders have expanded and diversified. It outlines Docker's current free, open source, and commercial products and services and thanks major contributors, maintainers, and the growing ecosystem and community around Docker.