Web进程无法绑定$ port节点

Question

Heroku由于某种原因忽略了我的.env文件，即使express表示要使用的端口等等。我收到此错误

Web进程无法在60秒内绑定到$ PORT

我读了其他解决方案，谈论删除dotenv，但如果我这样做，它将崩溃我的应用程序。我需要dotenv来获取env变量，有没有办法我可以为heroku设置.env或者在heroku上部署express + react + postgress应用程序的最佳解决方案是什么？

这是我的个人资料

web: node app.js

app.js

var express = require('express');
var app = express();
var userRoute = require('./routes/users');
var postRoute  = require('./routes/posts');
var bodyParser = require('body-parser');
var logger = require('morgan');
var session = require('express-session');
var cookieParser = require('cookie-parser') ;
var dotenv = require('dotenv');
var env = dotenv.config();
var cors = require('cors');
var models = require('./models/');
const PORT = process.env.PORT || 8000;
const passport = require('passport');
const path = require('path');
// const allowOrigin = process.env.ALLOW_ORIGIN || '*'
// CORS Middleware
if (!process.env.PORT) 
  require('dotenv').config()


// console.log(process.env.DATABASE_URL);
if (!process.env.PORT) 
  console.log('[api][port] 8000 set as default')
  console.log('[api][header] Access-Control-Allow-Origin: * set as default')
 else 
  console.log('[api][node] Loaded ENV vars from .env file')
  console.log(`[api][port] $process.env.PORT`)
  console.log(`[api][header] Access-Control-Allow-Origin: $process.env.ALLOW_ORIGIN`)

require('./config/passport-github');
require('./config/passport');
app.use(logger('dev'));
app.use(express.static(path.join(__dirname, 'public')));
app.use(express.static(path.join(__dirname, 'build')));
app.use(cookieParser());
app.use(session(
  secret : process.env.JWT_SECRET,
  saveUninitialized: false,
  maxAge: 1000 * 60 * 60 * 84,
  resave: false
));
app.use(passport.initialize());
app.use(passport.session());
app.use(bodyParser.json());
app.use(bodyParser.urlencoded( extended:false)); 
const isAuthenticated = function(req, res, next)
  if(req.isAuthenticated())
    next();
    console.log('this works');
  else
   res.redirect('http://127.0.0.1:8001/signIn');
  

// app.use(function(req, res, next) 
//   res.header('Access-Control-Allow-Origin', '*');
//   // res.header('Access-Control-Allow-Credentials',  true);
//   res.header("preflightContinue", false)
//   // res.header('Access-Control-Allow-Methods', 'GET,PUT,POST,DELETE');
//   res.header('Access-Control-Allow-Headers', 'Content-Type, Authorization');
//   next();
// );
app.use(cors(
    'allowedHeaders': ['Content-Type'], // headers that React is sending to the API
    'exposedHeaders': ['Content-Type'], // headers that you are sending back to React
    'origin': '*',
    'methods': 'GET,HEAD,PUT,PATCH,POST,DELETE',
    'preflightContinue': false
));
app.use('/api/users', userRoute );
app.use('/api/posts', isAuthenticated,  postRoute );
app.use(function(req, res, next) 
  res.locals.user = req.user; // This is the important line
  // req.session.user = user
  console.log(res.locals.user);
  next();
);
models.sequelize.sync().then(() => 
  const server = app.listen(PORT, () => 
    console.log(`Server is up and running on port $PORT`);
  );
);

的package.json


  "name": "sequelize-demo",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": 
    "test": "echo \"Error: no test specified\" && exit 1",
    "client": "cd ./client && npm start ",
    "server": "nodemon app.js",
    "start": "concurrently --kill-others  \"npm run client\" \"npm run server\" ",
    "heroku-postbuild": "cd client && npm install && npm run build"
  ,
  "author": "",
  "license": "ISC",
  "dependencies": 
    "async": "^2.6.1",
    "bcrypt": "^3.0.2",
    "body-parser": "^1.18.3",
    "concurrently": "^4.1.0",
    "cookie-parser": "^1.4.3",
    "cookie-session": "^2.0.0-beta.3",
    "cors": "^2.8.5",
    "crypto": "^1.0.1",
    "dotenv": "^7.0.0",
    "express": "^4.16.4",
    "express-flash": "0.0.2",
    "express-session": "^1.15.6",
    "foreman": "^3.0.1",
    "jsonwebtoken": "^8.4.0",
    "morgan": "^1.9.1",
    "nodemailer": "^5.1.1",
    "nodemon": "^1.18.9",
    "passport": "^0.4.0",
    "passport-github": "^1.1.0",
    "passport-github2": "^0.1.11",
    "passport-jwt": "^4.0.0",
    "passport-local": "^1.0.0",
    "pg": "^7.8.0",
    "pg-hstore": "^2.3.2",
    "sequelize": "^4.42.0"
  ,
  "devDependencies": 
    "chai": "^4.2.0",
    "mocha": "^6.1.2"

配置/ database.js

if (!process.env.PG_DB) 
    const fs = require('fs')
    const dotenv = require('dotenv')
    const envConfig = dotenv.config(silent: true)

    // for (var k in envConfig) 
    //   process.env[k] = envConfig[k]
    // 

    console.log('[api][sequelize] Loaded database ENV vars from .env file')
  

  module.exports = 
    development: 
      username: process.env.POSTGRES_USER,
      password: process.env.POSTGRES_PASSWORD,
      database: process.env.POSTGRES_DB,
      host: process.env.POSTGRES_HOST,
      dialect: 'postgres',
      migrationStorageTableName: 'sequelize_meta'
    ,

    production: 
      username: "root",
      password: null,
      database: "*******",
      host: "127.0.0.1",
      dialect: "postgres"

配置/ config.json


  "development": 
    "username": "eli",
    "password": "",
    "database": "elitest4",
    "host": "127.0.0.1",
    "dialect": "postgres"
  ,
  "test": 
    "username": "root",
    "password": null,
    "database": "database_test",
    "host": "127.0.0.1",
    "dialect": "postgres"
  ,
  "production": 
    "username": "root",
    "password": null,
    "database": "*******",
    "host": "127.0.0.1",
    "dialect": "postgres"

客户端/的package.json


  "name": "client",
  "version": "0.1.0",
  "private": true,
  "dependencies": 
    "@material-ui/core": "^3.9.1",
    "@material-ui/icons": "^3.0.2",
    "axios": "^0.18.0",
    "history": "^4.7.2",
    "http-proxy-middleware": "^0.19.1",
    "jsonwebtoken": "^8.4.0",
    "jwt-decode": "^2.2.0",
    "material-ui-icons": "^1.0.0-beta.36",
    "moment": "^2.24.0",
    "react": "^16.7.0",
    "react-dom": "^16.7.0",
    "react-redux": "^6.0.0",
    "react-router-dom": "^4.3.1",
    "react-scripts": "2.1.3",
    "redux": "^4.0.1",
    "redux-thunk": "^2.3.0",
    "superagent": "^4.1.0"
  ,
  "scripts": 
    "start": "PORT=8001 react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test",
    "eject": "react-scripts eject",
    "postinstall": "react-scripts build"
  ,
  "eslintConfig": 
    "extends": "react-app"
  ,
  "browserslist": [
    ">0.2%",
    "not dead",
    "not ie <= 11",
    "not op_mini all"
  ],
  "devDependencies": 
    "dotenv": "^6.2.0"