As someone learning Docker for the first time, I was very satisfied with this lecture. When learning a new technology for the first time, it can be frustrating if the content of the lecture is too deep or too shallow. However, this lecture explained the necessary concepts at an appropriate level of difficulty, so I was able to listen without any problems. Also, the practice sessions that always followed the concept explanations were very helpful in getting me used to using Docker. I also bought the book that was published based on the lecture content as soon as it came out, and it's almost the same as the lecture content, so it's very helpful for reviewing. The CI part is only briefly included in the lecture, but it would be great if there would be a lecture on deployment and CI/CD using Docker in the future.