in newswires/app/controllers/ViteController.scala [108:117]
def preview: Action[AnyContent] = addToken(asset("preview.html"))
def asset(resource: String): Action[AnyContent] = authAction.async {
request =>
if (mode == Mode.Dev) {
proxyAsset(resource, request)
} else {
assets.at(resource)(request)
}
}