Explore the challenges and solutions of creating scalable code lab environments for workshops and live demos in this 16-minute Docker conference talk. Learn how to build reproducible training platforms using Docker Engine, Swarm Mode, Docker-Compose, Moby, and LinuxKit. Discover the lessons learned from implementing a Codelab toolkit for workshops with over 120 participants, inspired by "Play With Docker" but expanded to support any service collection. Gain insights into treating training environments as production platforms, overcoming limitations, and leveraging Docker tools for efficient knowledge sharing. Follow the speaker's journey of building a system to teach others, and understand how Docker can be used as a tool for massive knowledge dissemination in the tech industry. The talk covers topics such as practical exercises, Jenkins training, deployment strategies, monitoring, scaling patterns, resource management, and provides takeaways for implementing similar solutions.