Cross-Domain web service deployment

When deploying web services or web applications, many times I directly copy these projects to the wwwroot directory. If cross-origin problems occur, I can directly put the cross-origin files in this directory, in fact, we do not need to do this during deployment. First, this will make the wwwroot directory bigger, and this is generally on the system disk. Therefore, we often create virtual directories, use a virtual directory to point to the physical address of the web service, and then place the cross-domain file on this physical address.