agentsclimarketplace

Containerization

Skill bmaltais/skills/containerization

Install
npx -y skills add bmaltais/skills --skill containerization

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

2 things to look at

  • no licenseNo license file was found in the repository. Code published without one is not open source by default, so using it at work is a question for whoever answers licensing questions where you are.
  • 1 stars1 stars. Stars are a popularity signal and not a quality one, but at this level it is likely that nobody has read this closely except its author, and you would be relying on your own review.

What its author says it does

Copied from the file, not written here

Comprehensive best practices for creating optimized, secure, and efficient Docker images and managing containers. Covers multi-stage builds, image layer optimization, security scanning, and runtime best practices. Use when reviewing or writing Dockerfiles, docker-compose files, or container deployment configs. Trigger on phrases like "review my Dockerfile", "optimize this image", "Docker best practices", "container security", "multi-stage build", "reduce image size", "docker-compose review".

SKILL.md

2.6 KB, as published. Nobody here has run it

Containerization & Docker Best Practices

Guide developers in building efficient, secure, and maintainable Docker images.

Core Principles

  1. Immutability — Never modify running containers; build new images for every change.
  2. Portability — Externalize config; images run identically across environments.
  3. Isolation — One process per container; use namespaces and resource limits.
  4. Efficiency — Smaller images = faster builds, pulls, deploys, fewer CVEs.

Routing Table

TopicReference
Dockerfile authoring (multi-stage, layers, COPY, CMD, ENV)references/dockerfile.md
Security (non-root, minimal base, signing, secrets, caps)references/security.md
Runtime & orchestration (resources, logging, volumes, nets)references/runtime.md
Review checklist & troubleshootingreferences/checklist.md

Quick Decision Guide

  • Compiled language? → Multi-stage build mandatory. See references/dockerfile.md.
  • Security review? → Start with references/security.md + references/checklist.md.
  • Image too large? → Check base image, layer optimization, .dockerignore in references/dockerfile.md.
  • Runtime issues? → Resource limits, health checks, logging in references/runtime.md.

Key Rules (Always Apply)

  • Use specific version tags, never latest in production.
  • Run as non-root user — create a dedicated user in every Dockerfile.
  • Use exec form for CMD/ENTRYPOINT (["cmd", "arg"] not shell form).
  • Never embed secrets in image layers.
  • Always include a HEALTHCHECK instruction.
  • Always include a comprehensive .dockerignore file.

Keep looking

Skills are one crate of 328,083. Ordering is by how many stacks a row turns up in, so the top of any crate is what has actually been picked rather than what has the most stars.