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我一直在尝试在 heroku 上的 appname 'picbookapp' 下部署一个 nodejs 应用程序,它有一个 mongo 数据库。对于 mongodb,我使用了 mlabs,并且我已经将 MONGO_URI 添加到我的 heroku 应用程序的配置变量中。我还添加了 Procfile 文件。但是由于某些原因,我遇到了错误。由于我是应用程序部署的新手,任何形式的帮助都将受到高度赞赏。以下是一些错误日志 开始:未找到代码 ELIFECYCLE、errrno ENOENT、文件 sh、系统调用生成、生成 ENOENT 此处是packag.json 文件——

{
  "name": "gridfsandmulter",
  "version": "1.0.0",
  "private": true,
  "description": "",
  "main": "server.js",
  "scripts": {
    "start": "node server.js",
  "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "Harshit",
  "license": "ISC",
  "dependencies": {
    "body-parser": "^1.17.2",
    "bootstrap": "^3.3.7",
    "connect-flash": "^0.1.1",
    "cookie-parser": "^1.4.3",
    "ejs": "^2.5.7",
    "express": "^4.15.3",
    "express-session": "^1.15.4",
    "gridfs-stream": "^1.1.1",
    "hbs": "^4.0.1",
    "mongod": "^2.0.0",
    "mongodb": "^2.2.30",
    "mongoose": "^4.11.4",
    "multer": "^1.3.0",
    "passport": "^0.3.2",
    "passport-local": "^1.0.0"
  },
  "engines": {
    "node": "4.1.1",
    "npm": "5.0.3"
  }
}

这是database.js

/**
 * Created by harshitbisht96 on 30/7/17.
 */
var mongodb=require('mongodb');
var MongoClient=mongodb.MongoClient;
var url=process.env.MONGOLAB_URI||'mongodb://localhost:27017/imageDatabase';

function getDb(){
     return MongoClient.connect(url).then(function (db) {
        // console.log(MongoClient.connect(url));
        return db;
    })
}




module.exports=getDb();
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