Enable double ctrl + c for cancel context in go

main.go

	signalChan := make(chan os.Signal, 1)

	signal.Notify(signalChan, os.Interrupt)

	ctx := context.Background()
	ctx, cancel := context.WithCancel(ctx)

	go func() {
		select {
		case <-signalChan: // first signal, cancel context
			cancel()
		case <-ctx.Done():
		}
		<-signalChan // second signal, hard exit
		os.Exit(1)
	}()