prow/cmd/deck/main.go
func localOnlyMain(cfg config.Getter, o options, mux *http.ServeMux) *http.ServeMux {
	mux.Handle("/github-login", gziphandler.GzipHandler(handleSimpleTemplate(o, cfg, "github-login.html", nil)))

	if o.spyglass {
		initSpyglass(cfg, o, mux, nil)
	}

	return mux
}
func localOnlyMain(cfg config.Getter, o options, mux *http.ServeMux) *http.ServeMux {
	mux.Handle("/github-login", gziphandler.GzipHandler(handleSimpleTemplate(o, cfg, "github-login.html", nil)))

	if o.spyglass {
		initSpyglass(cfg, o, mux, nil)
	}

	return mux
}
// localOnlyMain contains logic used only when running locally, and is mutually exclusive with
// prodOnlyMain.