curl http://localhost:5000/v2/_catalog
{"repositories":["centos","golang"]}

#[derive(Deserialize, Debug, Clone)]
pub struct RegistryCatalog {
    pub repositories: Vec<String>,
}

    fn rendered(&mut self, first_render: bool) {
        if first_render {
            ConsoleService::info("view app");
            let request = Request::get("http://localhost:5000/v2/_catalog")
                .body(Nothing)
                .expect("could not build request.");
            let callback = self.link.callback(
                |response: Response<Json<Result<RegistryCatalog, anyhow::Error>>>| {
                    let Json(data) = response.into_body();
                    ConsoleService::info(&format!("info {:?}", data)); 
                    Msg::GetRegistryCatelog(data)
                },
            );
            let task = FetchService::fetch(request, callback).expect("failed to start request");
        }
    }