Docker Complete Guide

Docker Complete Guide

From containers to production — beginner to interview-ready,

in one guide. Not just commands, but the actual reasoning: why

builds are slow, why healthchecks matter, why multi-stage

builds exist.

What's inside:

→ Core concepts: images vs containers, layers, containers vs VMs

→ Dockerfile essentials: CMD vs ENTRYPOINT, multi-stage builds

→ Volumes, networking, and healthchecks that actually catch failures

→ 8-command cheat sheet

→ 5 common mistakes to avoid

→ 10 real interview questions, with what a strong answer touches on

→ A real hands-on project to prove you know this

Part of a growing single-topic guide series — more coming soon.