add(hostname, options) {
        // Store host options
        this.#hosts[hostname] = options;

        // Register the host server with uWS
        this.#app.uws_instance.addServerName(hostname, options);

        // Return this instance
        return this;
    }
Registers the unique host options to use for the specified hostname for incoming requests.

@param {String} hostname
@param {HostOptions} options
@returns {HostManager}