docker-patterns

name	docker-patterns
type	reference
description	Docker and Docker Compose patterns for local development, container security, networking, volume strategies, and multi-service orchestration.
origin	ECC
paths	["**/Dockerfile*","**/docker-compose*","**/.dockerignore"]
effort	2
allowed-tools	Read, Glob, Grep
user-invocable	true
when_to_use	When setting up Docker or Docker Compose for containerized development, multi-service orchestration, or container security

Docker Patterns

Docker and Docker Compose best practices for containerized development.

When to Activate

• Setting up Docker Compose for local development
• Designing multi-container architectures
• Troubleshooting container networking or volume issues
• Reviewing Dockerfiles for security and size
• Migrating from local dev to containerized workflow

Docker Compose for Local Development

Standard Web App Stack

# docker-compose.yml
services:
  app:
    build:
      context: .
      target: dev                     # Use dev stage of multi-stage Dockerfile
    ports:
      - "3000:3000"
    volumes:
      - .:/app                        # Bind mount for hot reload
      - /app/node_modules             # Anonymous volume -- preserves container deps
    environment:
      - DATABASE_URL=postgres://postgres:postgres@db:5432/app_dev
      - REDIS_URL=redis://redis:6379/0
      - NODE_ENV=development
    depends_on:
      db:
        condition: service_healthy
      redis:
        condition: service_started
    command: npm run dev

  db:
    image: postgres:16-alpine
    ports:
       
    
       
       
       
    
       
       
    
       [, ]