Wow.... Thank you so much.. Even if I only watch the lectures related to Spring Boot, they are project-centered, so I thought, "Oh, is this it?" about basic framework-related functions or detailed functions. After listening to the lecture, I was able to easily understand the basic contents related to the projects I had been working on until now before listening to this lecture, so I feel so wronged, but I am grateful. This lecture is free... It's like a dream..