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0098-multi-stage-dockerfile

Create multi-stage Dockerfiles with minimal runtime images and non-root execution.

Updated Aug 23, 2026
Search Tags:#docker#container security#build optimization#multi-stage#reproducible builds#image size
One-click install
npx skills add https://github.com/MrJmpl3/codex_____data_____configuration --skill 0098-multi-stage-dockerfile
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: 0098-multi-stage-dockerfile
Source: https://github.com/MrJmpl3/codex_____data_____configuration/tree/main/skills/0098-multi-stage-dockerfile
Command: npx skills add https://github.com/MrJmpl3/codex_____data_____configuration --skill 0098-multi-stage-dockerfile

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

It helps you avoid bloated, insecure Docker images by guiding you to separate build-time and runtime concerns and copy only what you need into the final stage.

Core Features & Use Cases

  • Optimized Multi-Stage Builds: Uses dedicated builder and runtime stages so compilation, dependency installation, and tests never ship to production.
  • Reproducible, Minimal Base Images: Encourages official, minimal images with exact version tags and optional distroless/runtime hardening where compatible.
  • Security and Layer Efficiency: Promotes non-root execution, removal of build tools from the final image, safer file permissions, and caching-friendly layer ordering.

Quick Start

Ask the AI to generate a production-ready multi-stage Dockerfile for your application that uses a builder stage, a minimal runtime stage, non-root execution, and efficient layer caching.

Frequently Asked Questions about 0098-multi-stage-dockerfile

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

FAQPage Schema
How do I build smaller Docker images using multi-stage builds?▼

Multi-stage Docker builds reduce image size by using dedicated builder stages for compilation and dependency installation, then copying only the necessary runtime artifacts into a minimal final stage. This omits build tools and secrets from production images.

What's the best way to improve container security in a Dockerfile?▼

Container security improves by configuring non-root execution, using strict base image versioning, and removing build tools from the final Docker image. Multi-stage builds ensure compilation dependencies and secrets never ship to production.

Does multi-stage Dockerfile work with any programming language or framework?▼

Multi-stage Dockerfiles apply across languages and frameworks for compilation, dependency installation, testing, and minimal artifact handoff between stages. You can use stage naming with AS to separate builder and runtime environments regardless of stack.

How do I optimize Docker layer caching for reproducible builds?▼

Reproducible builds use cache-friendly command ordering and official minimal images with exact version tags. Placing frequently changing instructions like dependency installation later in the Dockerfile optimizes layer caching across multi-stage builds.

Why does my Docker image include build tools and unnecessary dependencies in production?▼

Single-stage Dockerfiles ship all build-time tools and dependencies to production. Multi-stage builds solve this by copying only compiled artifacts from the builder stage into a minimal runtime stage, excluding build tools and secrets.

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