Docker Tutorial

1. Docker Introduction

What containers are, how they differ from VMs, installing Docker, and your first container.

2. Images and Dockerfiles

A complete multi-stage Dockerfile, layer caching, and building images with docker build.

3. Volumes and Networking

Named volumes vs bind mounts and how containers communicate over Docker networks.

4. Docker Compose

Defining a multi-container app in docker-compose.yml, environment variables, and .env files.

5. Multi-Stage Build Optimization

A Go build that shrinks an 800MB toolchain image to under 10MB, plus BuildKit cache mounts and layer-caching tricks.

6. Security Best Practices

Running as a non-root user, choosing minimal/distroless base images, and scanning images for known vulnerabilities.

7. Production Orchestration Patterns

Health checks, restart policies, resource limits, graceful shutdown, and log rotation for containers in production.

8. Docker Interview Questions

Common Docker interview questions covering containers, images, volumes, and networking.