0005-docker-expert

Diagnose Dockerfile and Compose setups for optimization and security hardening.

Updated Aug 23, 2026

Search Tags:#container security #dockerfile #image optimization #build validation #healthchecks #multi-stage builds #compose orchestration

Ready to run

npx skills add https://github.com/MrJmpl3/codex_____data_____configuration --skill 0005-docker-expert

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: 0005-docker-expert
Source: https://github.com/MrJmpl3/codex_____data_____configuration/tree/main/skills/0005-docker-expert
Command: npx skills add https://github.com/MrJmpl3/codex_____data_____configuration --skill 0005-docker-expert

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

It helps teams fix slow, insecure, oversized, and unreliable Docker builds by applying production-grade containerization best practices and validation workflows.

Core Features & Use Cases

Dockerfile optimization & multi-stage builds: Improves build caching, reduces image size, and structures artifacts for clean production runtimes.
Container security hardening: Guides non-root execution, safer base image usage, and secret-handling patterns to lower attack surface.
Compose orchestration & validation: Validates Docker/Compose configurations and runtime behavior using health checks and repeatable build/run checks.

Quick Start

Use the 0005-docker-expert skill to analyze my Dockerfile and Compose setup and tell me exactly what to change to improve security, reduce image size, and ensure production reliability.

Frequently Asked Questions about 0005-docker-expert

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I reduce Docker image size and optimize my Dockerfile for production?▼

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.

What is the best way to harden container security and configure non-root runtime in Docker?▼

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.

How do I validate Docker Compose orchestration and add health checks for production reliability?▼

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.

Does this approach work with my existing Dockerfile and Compose setup, or do I need to start from scratch?▼

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.

Why is my Docker build slow, and how can multi-stage builds improve caching?▼

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.