If your application is present on /public/build and the application requires /build then please define an http redirection (can be installed as an IIS component) such as:
Redirect requests to destination: http://localhost/public/build
Redirection Behavior: It should be modified is necessary according to your needs. Leave the two options blank for now.
This redirection will redirect every request http://localhost/build/xyz to http://localhost/public/build/xyz. If the URL address or links in the page should not be seen by users as /public/build... then you may use more advanced URL Rewrite Module.