There were some difficult parts in taking this lecture because the systems I am currently developing and operating are legacy systems that run on the company data center. However, I was able to learn a lot other than Github Actions by looking at the various system connections and new development patterns introduced in this lecture. Unlike the general 101 lecture, I am grateful for the many comments from my rich experience that were very stimulating and helpful. Github Actions will be applied to GHE, which I will be managing in the future, and I think it will be very helpful. Thank you.