main.go

...
func main() {
	fx.New(
		...
		fx.Invoke(registerHooks),
	).Run()
}

func registerHooks(
	lifecycle fx.Lifecycle,
	logger *zap.SugaredLogger, cfg *Config, mux *http.ServeMux,
) {
	lifecycle.Append(
		fx.Hook{
			OnStart: func(context.Context) error {
				go http.ListenAndServe(cfg.ApplicationConfig.Address, mux)
				return nil
			},
			OnStop: func(context.Context) error {
				return logger.Sync()
			},
		},
	)
}