import * as express from 'express';
import { Server as HttpServer } from 'http';
import { Event } from '../common/event/Event';
export declare class Server {
    onStarted: Event<void>;
    app: express.Express;
    private server;
    static instance: Server;
    static getInstance(): Server;
    constructor(listen?: boolean);
    get Server(): HttpServer;
    init(listen?: boolean): Promise<void>;
    private SIGTERM;
    /**
     *
     * Event listener for HTTP server "error" event.
     */
    private onError;
    /**
     * Event listener for HTTP server "listening" event.
     */
    private onListening;
    /**
     * Event listener for HTTP server "close" event.
     */
    private onClose;
    private static getAppTrustProxyConfig;
    Stop(): Promise<void>;
}