# Docker > Accelerate how you build, share, and run applications Use when this capability is needed. - Skill: `tomevault-io/docker` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/docker` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/docker/raw - Safety review: pending (external: skill-scanner PASS, skillspector PASS) - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: DevOps & Infra - Author: tomevault-io (https://skillmd.com/u/tomevault-io) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/tomevault-io/docker --- # Docker Skill ## Best Practices 1. **Multi-Stage Builds**: Use a builder stage to compile, and a runner stage (Alpine/Slim) for the final image to reduce size. 2. **Caching**: Order usage matters. Copy `package.json` and install deps BEFORE copying source code to leverage layer caching. 3. **User**: Don't run as `root`. Create a dedicated user in the Dockerfile. ## Common Pitfalls * **Secrets**: Baking secrets/env vars into the image. Use Env Vars at runtime. * **Latest Tag**: Pin versions (`node:18`, not `node:latest`) to avoid breaking changes. ## References * [Dockerfile Best Practices](https://docs.docker.com/develop/develop-images/dockerfile_best-practices/) --- > Converted and distributed by [TomeVault](https://tomevault.io/claim/sami) — claim your Tome and manage your conversions.