Docker & Containers

What’s inside

• Foundations — Your first docker run, images, layers, and writing Dockerfiles that cache well
• Data & Networking — Volumes, bind mounts, networks, and multi-service apps with Compose
• Production Posture — Healthchecks, resource limits, image scanning, security hardening, and CI/CD gates
• Command-first teaching — every concept arrives as a runnable docker command or a real YAML/Dockerfile block, never slideware
• Every trap marked with the real error text — 'port is already allocated', 'exec format error', OOMKilled 137 — the messages you'll actually meet
• Every checklist line carries a proof command — if you can't run something that shows it, it isn't done
• A practice challenge + a harder bonus drill in every chapter — each with a full worked solution, plus a complete challenge answer key (54 challenges)
• 5 Capstone Builds — One-Command WordPress, a Static Site Pipeline, a Self-Hosted Dev Lab, a Hub-ready CLI image, and a Resilient production stack