Docker Patterns

Produces secure, minimal, and efficiently-cached Docker images using multi-stage builds, non-root users, and proper layer ordering.

Purpose

Produce secure, minimal, and efficiently-cached Docker images using multi-stage builds, non-root users, and proper layer ordering to reduce image size, attack surface, and CI build times.

Trigger

Apply when the user requests:

• "Dockerfile", "Docker", "containerize", "docker-compose", "container best practices"
• "multi-stage build", "Docker optimization", "write a Dockerfile"
• "容器化", "寫 Dockerfile", "Docker 優化", "docker 設定"

Do NOT trigger for:

• Kubernetes configuration (different domain and tooling)
• CI/CD pipeline setup — use a dedicated ci-cd-pipeline skill