code: func NewDefaultConfig() *Config {
  	return &Config{
  		DNSZone:            env.GetOrFile("DNS_ZONE"),
  		PropagationTimeout: env.GetOrDefaultSecond("LIGHTSAIL_PROPAGATION_TIMEOUT", dns01.DefaultPropagationTimeout),
  		PollingInterval:    env.GetOrDefaultSecond("LIGHTSAIL_POLLING_INTERVAL", dns01.DefaultPollingInterval),
  		Region:             env.GetOrDefaultString("LIGHTSAIL_REGION", "us-east-1"),
  	}
  }
docs: // NewDefaultConfig returns a default configuration for the DNSProvider