Docker from Scratch: Build Production-Ready Containers

Ahnii!

This series covers Docker container fundamentals from your first Dockerfile to production-ready patterns. Each post builds on the previous, but they work as standalone references too.

1. Writing Your First Dockerfile

Dockerfile basics — FROM, COPY, RUN, CMD — and building your first container image.

2. Shrink Your Images With Multi-Stage Builds

Use multi-stage Dockerfiles to separate build tooling from your runtime image, cutting image size by 90% or more.

3. Secure Your Containers With Non-Root Users

Run containers as non-root users, choose minimal base images, and keep secrets out of your Docker layers.

4. Speed Up Builds With Caching and BuildKit

Use layer caching, BuildKit cache mounts, and parallel stages to make your Docker builds faster.

5. Advanced Dockerfile Patterns

Conditional builds with ARG, health checks, cross-platform images, linting, and other Dockerfile patterns for production use.

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