...
#[tokio::main]
async fn main() {
    let store = Store::new();
    let store_filter = warp::any().map(move || store.clone());
    ...
    let get_questions = warp::get()
        .and(warp::path("questions"))
        .and(warp::path::end())
        .and(store_filter)
        .and_then(get_questions)
        .recover(return_error);
    let routes = get_questions.with(cors);

    warp::serve(routes).run(([127, 0, 0, 1], 3030)).await;
}
...