Docker Compose Dev Environment Recipe

docker-compose.yml

```yaml services: app: build: . ports: - "3000:3000" environment: - DATABASE_URL=postgresql://postgres:postgres@db:5432/myapp - REDIS_URL=redis://redis:6379 depends_on: - db - redis volumes: - .:/app - /app/node_modules

db: image: postgres:16-alpine ports: - "5432:5432" environment: POSTGRES_DB: myapp POSTGRES_PASSWORD: postgres volumes: - pgdata:/var/lib/postgresql/data

redis: image: redis:7-alpine ports: - "6379:6379"

volumes: pgdata: ```

Commands

• docker compose up -d — start all services
• docker compose logs -f app — follow app logs
• docker compose down -v — stop and remove volumes
• docker compose exec db psql -U postgres myapp — connect to DB

Tips

• Use volumes for node_modules to avoid platform issues
• Add healthchecks for dependent services
• Use .env file for environment variables
• Use profiles for optional services (e.g. mailhog)