Hello. It seems that the development environment, installation programs, and tools have version differences that are difficult to learn at this time. If you are an expert in the field, you can handle such version differences in no time, but for students who are not, it seems that they spend more time finding the differences on Google than the actual lecture content. I know you are busy with your main job, but I hope you can update the lecture environment to the latest technology environment when you have time. Also, the content is based on working on a local developer PC, but it would be nice to have additional explanations on how to deploy to 'development, testing, and operation' Linux servers at the company. Thank you.