I finally found a lecture that helps me understand CI/CD, which I had only heard about but did not understand at all while following the AWS deployment that I had been following. It is not easy to follow, but I am studying it thoroughly! The only downside is that you have to be prepared for the AWS fee. However, if you think of it as an opportunity to learn about cloud costs, I think it is not bad! I was very satisfied with the structure that helped me understand the structure by using Lightsail, breaking away from the difficult EC2 that I had been struggling with every time. Thank you for the quality lecture~