pub fn start(socket_addr: std::net::SocketAddr, tracker: Arc<Tracker>) -> impl Future<Output = hyper::Result<()>> {
    let app = router(tracker);

    let server = axum::Server::bind(&socket_addr).serve(app.into_make_service_with_connect_info::<std::net::SocketAddr>());

    server.with_graceful_shutdown(async move {
        tokio::signal::ctrl_c().await.expect("Failed to listen to shutdown signal.");
        info!("Stopping Torrust HTTP tracker server on http://{} ...", socket_addr);
    })
}

pub fn start_tls(
    socket_addr: std::net::SocketAddr,
    ssl_config: RustlsConfig,
    tracker: Arc<Tracker>,
) -> impl Future<Output = Result<(), std::io::Error>> {
    let app = router(tracker);

    let handle = Handle::new();
    let shutdown_handle = handle.clone();

    tokio::spawn(async move {
        tokio::signal::ctrl_c().await.expect("Failed to listen to shutdown signal.");
        info!("Stopping Torrust HTTP tracker server on https://{} ...", socket_addr);
        shutdown_handle.shutdown();
    });

    axum_server::bind_rustls(socket_addr, ssl_config)
        .handle(handle)
        .serve(app.into_make_service_with_connect_info::<std::net::SocketAddr>())
}