config

type App struct {
	// Engines is a map of engine name and engine executable path pairs.
	// This map must not be empty. If empty, panics when called New method.
	//
	// The key is the name of shogi engine. Any string is OK to use.
	// The value is the path of shogi engine.
	// It must be executable, and work with USI protocol.
	//
	// TODO: write document about USI protocol
	Engines map[string]string `yaml:"engines"`

	// Keys of Engines
	EngineNames []string `yaml:"engineNames"`
}

type Config struct {
	// application config
	App App

	// zap(logger) config
	Log zap.Config
}