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Docker Master Notes

Scratch → Advanced | English + Hinglish

Complete edition combining fundamentals, CLI, Dockerfiles, Compose, networking, troubleshooting, and interview prep.

Unit 1: Fundamentals

Docker vs VMs, Architecture, Objects, Installation, and the "First Day" Lab.

Unit 2: CLI & Dockerfile

Complete core CLI commands, Dockerfile syntax, caching, and multi-stage builds.

Unit 3: Storage & Compose

Volumes vs Bind Mounts, Networking, Ports, and writing multi-service Compose files.

Unit 4: Real Apps & Labs

Dockerizing Python/Flask, Node.js, and running databases (PostgreSQL/MongoDB).

Unit 5: Troubleshooting

Master debugging flow, image optimization, monitoring, and common failure scenarios.

Unit 6: Career & Next Steps

CI/CD pipelines, Docker Hub, Swarm/K8s, Interview Scenarios, and a 90-Day Roadmap.