Docker Expert skill: what it does and how to install it

What it does. Inspects Dockerfiles, Compose files, ignore rules and running containers, then addresses build caching, multi-stage images, security, networking, health checks and resource limits. It validates builds, runtime behaviour and Compose configuration with Docker commands.

When to use it. Use for Docker containerisation, reviews and troubleshooting across development and production setups. It hands off Kubernetes orchestration, GitHub Actions container pipelines, cloud-specific container services and complex database persistence to other specialists.