javascript - Heroku:端口上已经有东西在运行

Question

我是 Heroku 新手，我正在尝试部署我的节点服务器和 create-react-app 前端应用程序。一切都在本地运行得很好，但是当我尝试在 Heroku 上运行它时，一切都崩溃了。我没有收到任何部署错误，并且在我的 URL 处仅看到 Cannot GET/。

我的日志说:

Something is already running on port 12345

/server/app.js

var express = require('express');
var app = express();
require('dotenv').config();
var mongoose = require('mongoose');
var config = require('./config');
var apiController = require('./controllers/apiController');

var port = process.env.PORT || 3005;

app.use('/', express.static(__dirname + '/public'));

app.set('view engine', 'ejs');

mongoose.connect(config.getDbConnectionString());
apiController(app);

app.listen(port);

package.json

{
  "name": "happy-holidays",
  "version": "1.0.0",
  "description": "",
  "engines": {
    "node": "8.9.4"
  },
  "scripts": {
    "start": "concurrently --kill-others-on-fail \"yarn run server\" \"yarn run client\"",
    "server": "cd server && yarn start",
    "client": "cd react-ui && yarn start"
  },
  "license": "UNLICENSED" ,
  "cacheDirectories": [
    "node_modules",
    "react-ui/node_modules"
  ],
  "dependencies": {
    "@sendgrid/mail": "^6.2.1",
    "axios": "^0.18.0",
    "body-parser": "^1.18.2",
    "bootstrap": "^4.1.1",
    "concurrently": "^3.5.1",
    "dotenv": "^5.0.1",
    "ejs": "^2.6.1",
    "express": "^4.16.3",
    "mongoose": "^5.1.0",
    "react": "^16.3.2",
    "react-bootstrap": "^0.32.1",
    "react-dom": "^16.3.2",
    "react-router-dom": "^4.2.2",
    "react-scripts": "1.1.4",
    "semantic-ui-css": "^2.3.1",
    "semantic-ui-react": "^0.80.2"
  },
  "repository": {
    "type": "git",
    "url": "https://github.com/SaraRandolph/messagez"
  },
  "devDependencies": {}
}

Answer 1

“为什么端口 12345 来了而不是 3005 ？”

因为 HEROKU 动态分配 PORT。