I was curious about how it would be if I combined the advantages of Docker with Kali Linux as a VM, and that's when I found this lecture. First of all, I personally felt that the parts that change when the tools I used in Kali are changed through Docker were not focused on... Most of the lecture was spent on explaining Docker itself, and the part that was checked later seemed to be no different from using it in Kali... My curiosity about why I should use Docker was not resolved, and I personally have many regrets. Actually, I hesitated before applying for the lecture because there were too many lists about Docker, but I applied because there were too few materials on the Internet. Next time, I hope that you will focus on the parts that are clearly different when using Docker during the advanced course.