{
  "app": {
    "name": "my-app",
    "port": 80,
    "environment": "production"
  },
  "database": {
    "host": "prod-db.example.com",
    "port": 5432,
    "name": "prod_db",
    "user": "${DB_USER}",
    "password": "${DB_PASSWORD}",
    "url": "postgresql://${DB_USER}:${DB_PASSWORD}@prod-db.example.com:5432/prod_db"
  },
  "api": {
    "base_url": "https://api.example.com",
    "timeout": 10000,
    "retries": 5
  },
  "logging": {
    "level": "info",
    "format": "json",
    "output": "file",
    "file_path": "/var/log/app.log"
  },
  "security": {
    "enabled": true,
    "cors": {
      "origin": ["https://example.com"],
      "credentials": true
    }
  }
}