How to use the @serenity-js/local-server.ManageALocalServer.runningAHttpListener function in @serenity-js/local-server

describe('over HTTP', () => {

        // Fun fact: Before Cookie Monster ate his first cookie, he believed his name was Sid. You're welcome.
        const Sid = Actor.named('Sid').whoCan(
            BrowseTheWeb.using(protractor.browser),
            ManageALocalServer.runningAHttpListener(cookieCutterApp),
        );

        beforeEach(() => Sid.attemptsTo(StartLocalServer.onRandomPort()));
        afterEach(() => Sid.attemptsTo(StopLocalServer.ifRunning()));
        afterEach(() => Sid.attemptsTo(DeleteCookies.all()));

        describe('when working with the value', () => {

            /** @test {Cookie} */
            /** @test {Cookie#valueOf} */
            it('allows the actor to retrieve it', () => Sid.attemptsTo(
                Navigate.to(cookieCutterURLFor('/cookie?name=favourite&value=chocolate-chip')),
                Ensure.that(Cookie.valueOf('favourite'), equals('chocolate-chip')),
            ));

            /** @test {Cookie} */

prepare(actor: Actor): Actor {
        return actor.whoCan(
            ManageALocalServer.runningAHttpListener(requestHandler),
            CallAnApi.at('http://localhost'),
        );
    }
}