0005-docker-expert

Reduce Docker image size by applying multi-stage builds to separate build dependencies from final runtime artifacts. This skill analyzes your Dockerfile to improve layer caching, restructure artifacts, and strip unnecessary binaries for clean production images.

Harden container security by configuring non-root execution, selecting safer base images, and implementing proper secret-handling patterns. This skill diagnoses your setup to lower the attack surface and recommends targeted security changes for your existing Docker configuration.

Validate Docker Compose orchestration by running deterministic build and runtime checks with health checks. This skill analyzes your Compose configuration to ensure reliable runtime behavior and repeatable validation workflows for production deployments.

This approach works with your existing Dockerfile and Compose setup without starting from scratch. It provides structured analysis of your current patterns and recommends targeted changes to improve security, reduce size, and ensure production reliability.

Docker builds are slow when layer caching is poorly structured or dependencies change frequently. Multi-stage builds improve caching by isolating build dependencies from runtime artifacts, allowing Docker to reuse cached layers and reduce overall build times.