Javascript 将节点api部署到heroku时出现问题

我正在尝试为heroku构建一个节点api。当我在本地运行它时，初始路由将显示

Hello，weareployed

，

/widding

。route将从psql数据库显示婚礼中的用户，这是所有在屏幕上本地显示json数据的工作。本地没有错误，所以我将所有内容都推送到git，制作heroku应用程序，并将所有内容推送到heroku。Heroku成功构建了应用程序，当我打开应用程序时，它会显示此屏幕

这是我的app.js

const express = require('express');
const logger = require('morgan');
const path = require('path');
const bodyParser = require('body-parser');
const methodOverride = require('method-override');
const cookieParser = require('cookie-parser');

const app = express();
require('dotenv').config();

//middleware 
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({extended: false}));
app.use(methodOverride('_method'));
app.use(cookieParser());
app.use(express.static('public'));

const PORT = process.env.PORT || 3000;
app.listen(PORT, () => {
  console.log(`Listening on port ${PORT}`);
})

app.get('/', (req, res) => {
  res.send('hello we are deployed');
});

const weddingRoutes = require('./routes/weddingRoutes');
app.use('/wedding', weddingRoutes);

这是我的package.json文件

{
  "name": "just_us_api",
  "version": "1.0.0",
  "description": "",
  "main": "app.js",
  "engines": {
    "node": "8.9.3",
    "npm": " 5.5.1"
  },
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "start": "node app.js",
    "dev": "nodemon app.js",
    "debugger": "DEBUG=*:* npm run dev"
  },
  "repository": {
    "type": "git",
    "url": "https://github.com/jdiperi88/just_us_api.git"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "body-parser": "^1.18.3",
    "cookie-parser": "^1.4.3",
    "dotenv": "^4.0.0",
    "express": "^4.16.3",
    "html-entities": "^1.2.1",
    "isomorphic-fetch": "^2.2.1",
    "method-override": "^2.3.10",
    "morgan": "^1.9.0",
    "path": "^0.12.7",
    "pg-promise": "^6.10.3"
  }
}

---

我认为您可以从Heroku的仪表板上查看日志详细信息，这是查看错误的最简单方法。

---

可能您在“/routes/weddingRoutes”中的文件中遇到了一些问题。

您遇到了运行时错误。请运行heroku日志，回答这个问题，并添加该命令的输出。