grace

type Lifecycle struct {
	ShutdownTimeout time.Duration // Default: 30 seconds
	Signals         []os.Signal   // Default: SIGHUP, SIGINT, SIGTERM, SIGQUIT
	Logger          *slog.Logger  // Default: os.Stdout

	// Startup runs your main application logic (e.g., server.ListenAndServe).
	// This callback should block until the application is ready to shut down.
	// Do not call os.Exit or log.Fatal here; return an error instead.
	Startup func() error

	// Shutdown runs cleanup logic (e.g., server.Shutdown, closing DB connections).
	// The context has a timeout based on ShutdownTimeout.
	// Do not call os.Exit or log.Fatal here; return an error instead.
	Shutdown func(context.Context) error
}