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{
  "version": "3.8",
  "services": {
    "web": {
      "build": {
        "context": ".",
        "dockerfile": "Dockerfile"
      },
      "ports": [
        "3000:3000"
      ],
      "environment": {
        "NODE_ENV": "production",
        "DATABASE_URL": "postgres://user:secret@db:5432/app_db"
      },
      "depends_on": [
        "db",
        "redis"
      ],
      "restart": "always"
    },
    "db": {
      "image": "postgres:16-alpine",
      "restart": "always",
      "environment": {
        "POSTGRES_USER": "user",
        "POSTGRES_PASSWORD": "secret",
        "POSTGRES_DB": "app_db"
      },
      "volumes": [
        "db_data:/var/lib/postgresql/data"
      ],
      "ports": [
        "5432:5432"
      ]
    },
    "redis": {
      "image": "redis:7-alpine",
      "restart": "always",
      "ports": [
        "6379:6379"
      ]
    }
  },
  "volumes": {
    "db_data": {
      "driver": "local"
    }
  }
}