I was able to build the environment according to @rexthetech's "Zero to Witness". and became a witness. I'm really thankful to you. By the way, is there a part where you can confirm that you have become a witness without actually feeling that you have become a witness?

@rexthetech さんの「Zero to Witness」に従って、環境構築ができました。そして、証人になりました。本当にありがとうございました。ところで、証人になった実感がなく、証人になったことが確認できる箇所がありますか？