<ul><li>Docker simplifies packaging apps with code, libraries, and tools into portable units called containers.</li><li>Containers are lightweight, fast, and use less system resources compared to virtual machines.</li><li>Key Docker commands include docker ps, docker stop, docker images, and docker exec.</li><li>Understanding the difference between images and containers is crucial for Docker proficiency.</li><li>Dockerfiles are used to create custom Docker images, with layers aiding in efficient image building.</li><li>Best practices include using .dockerignore, tagging images, and avoiding running containers as root.</li><li>Volumes in Docker ensure data persistence, networks facilitate container communication, and Docker Compose simplifies multi-service app management.</li><li>Developers utilize Docker for consistent environments, CI/CD pipelines, and real-time testing.</li><li>Multi-stage builds, Docker Swarm, Kubernetes, security practices, and tools like Trivy are advanced Docker concepts.</li><li>Common beginner mistakes include using :latest tags, forgetting .dockerignore, running containers as root, and not cleaning up regularly.</li></ul>

The Only Docker Guide You’ll Ever Need (Beginner to Expert)

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