Dockerfile Optimizer

A comprehensive Dockerfile optimization skill that transforms bloated container images into lean, secure, production-grade artifacts. Includes a systematic audit checklist covering base image selection (with size reference table), multi-stage build patterns for Node.js/Go/Python/Rust/Java, layer caching strategies with BuildKit mount caches, security hardening (non-root users, pinned versions, vulnerability scanning), and a ready-to-run audit script that flags issues instantly. Features a size reduction cheat sheet with typical savings per technique, language-specific production recipes, .dockerignore templates, and measuring tools (dive, trivy, docker scout). Turns a 1 GB Node.js image into 150 MB in minutes.