docker-expert

Automate secure Docker containerization with multi-stage builds and non-root execution.

Updated Apr 14, 2026

Search Tags:#security #containerization #docker #dockerfile #best-practices #compose #multistage-builds

Ready to run

npx skills add https://github.com/dallay/opencode-docker --skill docker-expert-dallay

💬 Prompt for ChatGPT / Claude Chat▼

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

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes assets (resource) components.

What problem does it solve?

Docker containerization often struggles with security and efficiency: users need production-ready guidance to build minimal, secure images and orchestrate containers reliably.

Core Features & Use Cases

Security-first patterns: enforce non-root users, secrets management, and attack-surface minimization in Dockerfiles and Compose.
Performance optimization: promote multi-stage builds, selective layering, and pinned base images to reduce image size and build time.
Production-ready orchestration: provide guidelines for robust docker-compose setups and runtime defaults across environments.
Use Case: containerize a Node.js app with a minimal runtime image and strict permissions, then compose with a separate database service.

Quick Start

Provide a production-ready Dockerfile and docker-compose setup with a non-root user in mind for a secure, efficient build.

Frequently Asked Questions about docker-expert

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

FAQPage Schema

How do I create a production-ready Dockerfile with a non-root user?▼

To create a production-ready Dockerfile with a non-root user, enforce non-root execution and minimal permissions during the build stage. This approach minimizes the attack surface and secures container runtime.

What's the best way to reduce Docker image size using multi-stage builds?▼

The best way to reduce Docker image size is using multi-stage builds with selective layering and pinned base images. This technique discards unnecessary build dependencies, yielding minimal and efficient runtime images.

How do I handle secrets management in docker-compose orchestration?▼

Handling secrets management in docker-compose orchestration requires strict runtime defaults and secure configurations. Enforcing secrets handling across environments protects sensitive data during containerized application deployment.

Why do I need pinned base images for secure containerization?▼

Pinned base images are needed for secure containerization to guarantee build reproducibility and minimize the attack surface. Pinning prevents unexpected vulnerabilities from upstream image updates in production environments.

Can I use docker-compose for production-ready orchestration with a separate database service?▼

Yes, you can use docker-compose for production-ready orchestration with a separate database service. Robust compose setups provide reliable runtime defaults and orchestrate multi-service architectures securely across environments.

Does Docker containerization require multi-stage builds for attack-surface minimization?▼

Docker containerization requires multi-stage builds for attack-surface minimization to effectively isolate build tools from final runtime images. This pattern enforces strict permissions and removes unnecessary binaries from production.