docker-best-practices

Multi-stage builds reduce Docker image size by separating build-time dependencies from runtime requirements, copying only necessary artifacts into the final stage. This pattern minimizes the final image footprint and attack surface.

BuildKit speeds up Docker builds by parallelizing independent build stages and intelligently caching layers. It improves build reproducibility and skips unchanged steps, significantly reducing build times in CI/CD pipelines.

Docker container security hardening involves running containers as non-root users, enforcing read-only filesystems, and avoiding baked-in secrets. Integrating vulnerability scanning into the pipeline further identifies image risks.

A .dockerignore file excludes unnecessary files and directories from the Docker build context. This prevents large or sensitive local files from being sent to the daemon, speeding up builds and reducing image bloat.

Vulnerability scanning integrates directly into CI/CD pipelines to automate security checks during image builds. This ensures containers are scanned for known risks before tagging and deployment, catching issues early.

The guidance applies to docker-compose configurations by providing patterns for local development and orchestration. It standardizes container definitions while ensuring minimal bases, health checks, and security practices are maintained.