# Install the "Docker & Multi-Stage Builds" skill

You are installing an AgenticMarket skill into this workspace. Follow these steps exactly.

## 1. Detect your environment and choose the destination file
- Andromity: `.andromity/skills/docker-containerization/SKILL.md` (or user scope `~/.andromity/skills/docker-containerization/SKILL.md`)
- Antigravity / Gemini CLI: `.agent/skills/docker-containerization/SKILL.md`
- Cursor: `.cursor/rules/docker-containerization.mdc`
- Claude Code: append to `CLAUDE.md` (or `.claude/skills/docker-containerization.md`)
- Windsurf: append to `.windsurfrules`
- Cline / Roo Code: `.clinerules/docker-containerization.md`
- GitHub Copilot: append to `.github/copilot-instructions.md`
- ChatGPT / web only: paste the content into Custom Instructions
- Any other agent: save to `.agent/skills/docker-containerization/SKILL.md`

## 2. Create the destination file
- Preserve every existing file and configuration entry.
- Create parent folders as needed.
- Never overwrite unrelated content.

## 3. Write exactly this content

```markdown
---
name: docker-containerization
description: "Author minimal, secure, production-grade Dockerfiles, multi-stage builds, non-root users, and Docker Compose environments."
author: docker
license: mit
version: 1.0.0
---
# Docker & Multi-Stage Builds

Best practices for container images:
1. Always use multi-stage builds to discard build dependencies and keep final images small (<100MB).
2. Use slim or alpine base images.
3. Run as a non-root user (`USER node` or `USER nonroot`).
4. Pin specific base image SHAs or minor versions for reproducible builds.
```

## 4. Verify
- Confirm the file exists and is readable.
- Report the destination path and confirm the "Docker & Multi-Stage Builds" skill is installed and active.

Skill metadata:
- Slug: docker-containerization
- Category: devops
- License: mit
- Source: AgenticMarket