我有一个节点应用程序，可以在本地主机上完美运行。但是将其部署到Heroku后会崩溃。

这是错误日志：

2019-11-07T10:58:20.359983+00:00 heroku[web.1]: Starting process with 
command `npm start`
2019-11-07T10:58:22.882837+00:00 heroku[web.1]: State changed from starting to crashed
2019-11-07T10:58:22.866125+00:00 heroku[web.1]: Process exited with status 1
2019-11-07T10:58:22.768738+00:00 app[web.1]: 
2019-11-07T10:58:22.768765+00:00 app[web.1]: > dpapi@1.0.0 start /app
2019-11-07T10:58:22.768768+00:00 app[web.1]: > nodemon --exec babel-node server.js --plugins css-modules-transform --ignore dist/
2019-11-07T10:58:22.768770+00:00 app[web.1]: 
2019-11-07T10:58:22.783839+00:00 app[web.1]: sh: 1: nodemon: not found
2019-11-07T10:58:22.788270+00:00 app[web.1]: npm ERR! code ELIFECYCLE
2019-11-07T10:58:22.788822+00:00 app[web.1]: npm ERR! syscall spawn
2019-11-07T10:58:22.789278+00:00 app[web.1]: npm ERR! file sh
2019-11-07T10:58:22.789688+00:00 app[web.1]: npm ERR! errno ENOENT
2019-11-07T10:58:22.791368+00:00 app[web.1]: npm ERR! dpapi@1.0.0 start: `nodemon --exec babel-node server.js --plugins css-modules-transform --ignore dist/`
2019-11-07T10:58:22.791637+00:00 app[web.1]: npm ERR! spawn ENOENT
2019-11-07T10:58:22.791917+00:00 app[web.1]: npm ERR!
2019-11-07T10:58:22.792199+00:00 app[web.1]: npm ERR! Failed at the dpapi@1.0.0 start script.
2019-11-07T10:58:22.792534+00:00 app[web.1]: npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
2019-11-07T10:58:22.802491+00:00 app[web.1]: 
2019-11-07T10:58:22.802775+00:00 app[web.1]: npm ERR! A complete log of this run can be found in:
2019-11-07T10:58:22.802918+00:00 app[web.1]: npm ERR!     /app/.npm/_logs/2019-11-07T10_58_22_793Z-debug.log

我不确定原因，但似乎找不到nodemon，也许无法安装所有依赖项。如错误消息中所述；

这是我的Procfile：

web: npm start

这是我的package.json

{


"name": "dpapi","version": "1.0.0","description": "","main": "index.js","scripts": {
    "start": "nodemon --exec babel-node server.js --plugins css-modules-transform --ignore dist/","dev": "webpack -wd"
  },"keywords": [],"author": "","license": "ISC","devDependencies": {
    "@babel/plugin-transform-runtime": "^7.4.4","babel-eslint": "^10.0.1","babel-preset-es2015": "^6.24.1","eslint": "^5.16.0","eslint-plugin-react": "^7.13.0","nodemon": "^1.18.11","webpack-cli": "^3.3.1"
  },"dependencies": {
    "@babel/core": "^7.4.4","@babel/node": "^7.2.2","@babel/plugin-proposal-class-properties": "^7.4.4","@babel/plugin-proposal-export-default-from": "^7.2.0","@babel/preset-env": "^7.4.4","@babel/preset-react": "^7.0.0","@material-ui/core": "^4.0.0-rc.0","@material-ui/icons": "^3.0.2","axios": "^0.18.0","babel-loader": "^8.0.5","bcrypt": "^3.0.6","body-parser": "^1.19.0","buffer": "^5.2.1","dropbox": "^4.0.17","ejs": "^2.6.1","express": "^4.16.4","global": "^4.4.0","imagemagick": "^0.1.3","isomorphic-fetch": "^2.2.1","js-file-download": "^0.4.7","jsonwebtoken": "^8.5.1","mongoose": "^5.5.7","morgan": "^1.9.1","multer": "^1.4.1","node-fetch": "^2.5.0","nodemailer": "^6.2.1","query-string": "^6.5.0","react": "^16.8.6","react-dom": "^16.8.6","react-redux": "^7.0.3","react-router-dom": "^5.0.0","react-stripe-elements": "^3.0.0","redux": "^4.0.1","redux-logger": "^3.0.6","rimraf": "^2.6.3","socket.io": "^2.2.0","socket.io-client": "^2.2.0","stripe": "^7.4.0","webpack": "^4.30.0"
  }
}