🐳 Docker Mastery

Your complete, hands-on journey from Docker beginner to confident practitioner — build images, run containers, orchestrate multi-service apps with Compose, and ship production-ready workloads.

📚 About This Course

Docker changed how software is built, shipped, and run. Instead of "it works on my machine," you package your app and everything it needs into a portable container that runs identically on your laptop, a teammate's machine, a CI server, and production — anywhere with a container runtime.

This course starts with zero assumptions and builds up methodically. Every concept is paired with real commands you can run, expected output so you know what success looks like, visual diagrams, and hands-on exercises with worked solutions. It reflects modern Docker: the docker compose v2 plugin, BuildKit/buildx builds, docker init scaffolding, and current image security practices.

What You'll Learn

What containers are, and how they differ from virtual machines
Docker's client/daemon architecture — images, containers, volumes, and networks
Running, inspecting, and managing containers with confidence
Writing efficient, secure Dockerfiles with multi-stage builds and layer caching
Orchestrating multi-container apps with Docker Compose v2
Registries, image security, logging, resource limits, and a path to orchestration

Who This Course Is For

Developers who want reproducible environments and painless deployments
Students and career-changers building a modern DevOps foundation
Anyone tired of "works on my machine" surprises

🗺️ Your Learning Path

graph LR A["Start Here"] --> B["Intro & Concepts"] B --> C["Architecture"] C --> D["Run Containers"] D --> E["Build Images"] E --> F["Compose Apps"] F --> G["Production"] G --> H["Docker Pro! 🎉"] style A fill:#bbf7d0,color:#1e293b style H fill:#fde68a,color:#1e293b

📖 Course Lessons

Module 1 — Docker Fundamentals

Understand what Docker is, why it matters, and how its pieces fit together.

Lesson 1: Introduction to Docker — containers vs VMs, the shipping-container analogy, core concepts
Lesson 2: Docker Architecture — engine, client/daemon, images, containers, networks & volumes

Module 2 — Containers & Images

Get hands-on: run real containers and build your own images.

Lesson 3: Your First Containers — running, managing, port mapping, logs & exec
Lesson 4: Building Images with Dockerfiles — syntax, layers, multi-stage builds, security

Module 3 — Multi-Container & Production

Compose whole application stacks and take them toward production.

Lesson 5: Docker Compose — YAML services, networking, volumes, dev workflow (v2)
Lesson 6: Advanced Docker & Production — registries, security, logging, orchestration intro

🧪 Practice & Tools

Apply everything with real projects, and rehearse commands safely.

Practice Lab — dockerize a Python API, a React + Node app, a WordPress stack, and microservices
Interactive Terminal — a simulated Docker shell to try commands with no install

🚀 Quick Command Reference

The commands you'll use constantly. Each one is explained in the lessons.

Command	What it does
`docker run hello-world`	Run a container from an image (pulls it first if needed)
`docker ps -a`	List all containers, running and stopped
`docker build -t myapp .`	Build an image from a `Dockerfile` in the current folder
`docker compose up -d`	Start a multi-container stack in the background (v2 plugin)
`docker logs -f <name>`	Follow a container's logs live
`docker exec -it <name> bash`	Open a shell inside a running container
`docker system prune -a`	Reclaim disk by removing unused data (careful!)

💻 Try the Interactive Terminal →

✅ Prerequisites & Setup

You need very little to start — just comfort with a command line and Docker installed.

Basic command-line familiarity (navigating folders, running commands)
A text editor (VS Code recommended)
Docker installed and running

Installing Docker

Windows / macOS: install Docker Desktop — includes the engine, CLI, Compose v2, and a dashboard.
Linux: install Docker Engine plus the Compose plugin. Add your user to the docker group to run without sudo.

Verify your install:

docker --version
docker compose version
docker run hello-world

✅ You're ready when…

docker run hello-world prints "Hello from Docker!". That confirms the client, daemon, image pull, and container run all work.