Docker has revolutionized how we develop, test, and deploy web applications. This comprehensive guide will take you from Docker basics to production-ready deployments. ## Why Docker Matters Docker solves the 'it works on my machine' problem by providing consistent environments across development, testing, and production. ## Docker Fundamentals Learn about containers, images, Dockerfiles, and the Docker ecosystem. We'll build your first containerized application step by step. ## Multi-Container Applications Explore Docker Compose for managing multi-container applications. Learn how to orchestrate databases, web servers, and other services. ## Production Deployment Discover best practices for deploying Docker containers in production, including security considerations and monitoring strategies.