package handler import "net/http" // NotFoundMiddleware Middleware to handle 404 errors type notFoundMiddleware struct { handler http.Handler } // ErrorPageData Data model for error page template type errorPageData struct { StatusCode int Title string Message string } // InstallPageData Data model for install page template type installPageData struct { StatusCode int } // IndexPageData Data model for index page template type indexPageData struct { StatusCode int Title string I18n string }