docker-infra-workflow

What problem does it solve?

This skill ensures that application environments are reproducible, secure, and production-ready using Docker and modern containerization practices.

Core Features & Use Cases

• Multi-stage builds are mandatory: Enforce separate builder and runner stages to keep production images lean.
• Least Privilege (Never run as root): Always create non-root users and switch to them in the final image.
• Layer Caching & Immutability: Copy dependency manifests first and install to leverage Docker's layer caching.

Core Rules for Docker Compose (Local Dev)

• Persistence: Use named volumes for databases and brokers to avoid data loss on restarts.
• Healthchecks & Dependency Ordering: Add healthchecks and use depends_on with condition: service_healthy.
• Environment Variables: Do not hardcode secrets; use .env files or environment interpolation.

Workflow

1. Analyze Stack: Determine language, framework, and required external services (DB, Cache).
2. Draft Dockerfile: Create an optimized, multi-stage Dockerfile.
3. Draft Compose: Create a docker-compose.yml for local development.
4. Explain: Briefly explain to the user how to start the environment.

Quick Start

Set up a reproducible local environment for a sample app using a multi-stage Dockerfile and docker-compose.