[Vuejs]-PublicPath does not work but __webpack_public_path__ does

In single-spa projects, we use systemjs-webpack-interop in order to set the __webpack_public_path__ dynamically based on the URL of where the microfrontend is hosted. This has worked well for hundreds of single-spa applications so you could consider using the same logic. This plugin is included in Vue projects generated by create-single-spa.