Docker Compose — Full Dev Environment

## Task
Complete Docker Compose development environment for a full-stack application.

## Requirements
- Services: App (Next.js), PostgreSQL, Redis, Background Worker, Nginx
- Hot reload for development
- Health checks on all services
- Named volumes for data persistence

## docker-compose.yml
```yaml
# Generate a production-grade docker-compose.yml with:

services:
  app:
    # Next.js with hot reload (bind mount src/)
    # Health check: curl localhost:3000/api/health
    # Depends on: db, redis
    # Environment from .env file

  db:
    # PostgreSQL 16 with named volume
    # Health check: pg_isready
    # Custom postgresql.conf for dev (more logging)
    # Init script in /docker-entrypoint-initdb.d/

  redis:
    # Redis 7 with persistence (AOF)
    # Health check: redis-cli ping
    # Max memory policy: allkeys-lru

  worker:
    # Same image as app, different command
    # Runs: node worker.js
    # Depends on: db, redis
    # Restart: unless-stopped

  nginx:
    # Reverse proxy with SSL termination (self-signed for dev)
    # Rate limiting
    # Gzip compression
    # Static file caching headers
```

## Implementation Notes
1. Use multi-stage Dockerfile: dev (with devDependencies) and prod (optimized)
2. .dockerignore: node_modules, .next, .git, .env
3. Bind mount only src/ for hot reload (not node_modules)
4. Use `depends_on` with `condition: service_healthy` — not just service_started
5. Network: create internal network, only expose nginx ports externally
6. Makefile with shortcuts: make up, make down, make logs, make shell