Container Development Expert knowledge for containerization and orchestration with focus on security-first , lean container images and 12-factor app methodology. When to Use This Skill | Use this skill when... | Use a language-specific sibling ( , , ) instead when... | |---|---| | Writing or optimizing language-agnostic Dockerfiles | Optimizing Go static binaries, Node.js Alpine builds, or Python slim images | | Authoring multi-stage build patterns or 12-factor configuration | The image-size goal is dominated by language runtime choices (scratch, distroless, musl/glibc) | | Hardening containe…