Node.js Can'；得不到'；节点服务器'；在平均堆栈上运行

我正在尝试阅读本教程：

它使用此处的平均剥离回购：

但是当我在运行

npm install

之后尝试运行

node server

时，我得到以下错误：

Error: Most middleware (like session) is no longer bundled with Express and must be installed separately. Please see https://github.com/senchalabs/connect#middleware.

我想这是因为Express 4，所以我将依赖项中的“最新”更改为“Express”：“3.x”

现在，当我运行

节点服务器

时，我在控制台中得到以下信息：

jamesontrinker@jamesons-imac ~/projects/mean-stripdown (master)*$ node server
connect deprecated multipart: use parser (multiparty, busboy, formidable) directly
node_modules/express/node_modules/connect/lib/middleware/bodyParser.js:56:20
connect deprecated limit: Restrict request size at location of read node_modules/express/node_modules/connect/lib/middleware/multipart.js:86:15
connect deprecated methodOverride: use method-override module directly config/express.js:44:21
Express app started on port 3000

events.js:72
    throw er; // Unhandled 'error' event
          ^
Error: failed to connect to [localhost:27017]

这是我的package.json：

{
"name": "mean"
, "description": "Mongo"
, "version": "1.0.0"
, "private": false
, "author": "MEAN - A Modern Stack: MongoDB, ExpressJS, AngularJS, NodeJS. (BONUS: Passport User Support)."
, "engines": {
    "node": "0.10.x"
  , "npm":  "1.2.x"
}
, "scripts": {
  "start": "NODE_ENV=development ./node_modules/.bin/nodemon server.js",
  "test": "NODE_ENV=test ./node_modules/.bin/mocha --reporter spec test/test-*.js"
}
, "dependencies": {
  "express": "3.x"
, "jade": "latest"
, "mongoose": "latest"
, "connect-mongo": "latest"
, "connect-flash": "latest"
, "passport": "latest"
, "passport-local": "latest"
, "passport-facebook": "latest"
, "passport-twitter": "latest"
, "passport-github": "latest"
, "passport-google-oauth": "latest"
, "imager": "latest"
, "notifier": "latest"
, "underscore": "latest"
, "gzippo": "latest"
, "async": "latest"
, "view-helpers": "latest"
, "forever": "latest"
, "mean-logger": "latest"
, "bower": "latest"
}

和模块依赖关系：

/**
 * Module dependencies.
**/

var express = require('express')
  , fs = require('fs')
  , passport = require('passport')
  , logger = require('mean-logger')

---

非常感谢。

27017是mongodb连接的默认端口。mongod在跑步吗？就是这样。我是个白痴。非常感谢。