/// <reference types="node" />
import { Server } from 'http';
import * as express from 'express';
export declare type TDestroyableServer = Server & {
    destroy: (cb: () => void) => void;
};
export declare function startServer(port: number, app: express.Express): Promise<TDestroyableServer>;
export declare class UnavailablePort extends Error {
    constructor(port: number);
}