Why won't the compiled files show up after executing npm run prod?

Question

npm

Good evening. I have a project written in vuejs. After executing the command npm run prod, minified scripts should be created, and when executed, docker build .it writes in the console that everything is OK, everything has been compiled and all files have been created, but in fact they are not in the container or in the folder that is registered in volumes. As I understand it, only files get into the container, but nothing comes out of it, and how should I develop if I can’t even get files from the container. I just assumed the cause of the problem, MB I'm wrong, so I'm asking for advice from those who know.