将应用程序部署到Heroku时遇到问题。我已经做了无数次了，直到现在一直运转良好。突然，我开始遇到一些问题（但是在本地，它就像一个魅力！）。将应用程序部署到Heroku并运行node index.js时，我收到错误消息：

Error: Cannot find module './knex'
Require stack:
- /app/node_modules/knex/lib/index.js
- /app/node_modules/knex/knex.js
- /app/src/domain/database/Knexconnection.js
- /app/src/routing/cities/CitiesDB.js
- /app/src/routing/cities/CitiesAPI.js
- /app/src/routing/Routes.js
- /app/src/routing/index.js
- /app/index.js
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:797:15)
    at Function.Module._load (internal/modules/cjs/loader.js:690:27)
    at Module.require (internal/modules/cjs/loader.js:852:19)
    at require (internal/modules/cjs/helpers.js:74:18)
    at Object.<anonymous> (/app/node_modules/knex/lib/index.js:8:14)
    at Module._compile (internal/modules/cjs/loader.js:959:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:995:10)
    at Module.load (internal/modules/cjs/loader.js:815:32)
    at Function.Module._load (internal/modules/cjs/loader.js:727:14)
    at Module.require (internal/modules/cjs/loader.js:852:19) {
  code: 'MODULE_NOT_FOUND',requireStack: [
    '/app/node_modules/knex/lib/index.js','/app/node_modules/knex/knex.js','/app/src/domain/database/Knexconnection.js','/app/src/routing/cities/CitiesDB.js','/app/src/routing/cities/CitiesAPI.js','/app/src/routing/Routes.js','/app/src/routing/index.js','/app/index.js'
  ]
}

在部署应用程序之前，我从未见过此错误。甚至在我部署该应用程序的两天前，都没有遇到任何较大的问题。从那时起，我所做的更改是我安装了axios以从节点应用程序调用第三方。

我的package.json看起来像这样：

{
  "name": "tefoWebService","version": "1.0.0","description": "","main": "index.js","scripts": {
    "test": "jest --forceExit","start": "nodemon index.js --development"
  },"repository": {
    "type": "git","url": "git+https://github.com/orzech1907/tefoWebService.git"
  },"keywords": [],"author": "","license": "ISC","bugs": {
    "url": "https://github.com/orzech1907/tefoWebService/issues"
  },"homepage": "https://github.com/orzech1907/tefoWebService#readme","dependencies": {
    "bugsnag": "^2.4.3","hapi": "^17.5.1","hapi-auth-jwt2": "^8.1.0","joi": "^13.4.0","jsonwebtoken": "^8.3.0","knex": "^0.16.3","nodemon": "^1.17.5","pg": "^7.4.3" 
  },"devDependencies": {
    "babel-cli": "^6.26.0","babel-preset-es2015": "^6.24.1","chai": "^4.2.0","chai-http": "^4.2.0","jest": "^23.6.0","rimraf": "^2.6.2"
  }
}

我已经尝试通过运行heroku run npm i -g knex在Heroku上全局安装knex，但没有效果，当我尝试启动迁移时，我遇到了另一个问题：

Error: Cannot find module './normalize-options.js'
Require stack:
- /app/node_modules/resolve/lib/async.js
- /app/node_modules/resolve/index.js
- /app/node_modules/liftoff/index.js
- /app/node_modules/knex/bin/cli.js
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:797:15)
    at Function.Module._load (internal/modules/cjs/loader.js:690:27)
    at Module.require (internal/modules/cjs/loader.js:852:19)
    at require (internal/modules/cjs/helpers.js:74:18)
    at Object.<anonymous> (/app/node_modules/resolve/lib/async.js:5:24)
    at Module._compile (internal/modules/cjs/loader.js:959:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:995:10)
    at Module.load (internal/modules/cjs/loader.js:815:32)
    at Function.Module._load (internal/modules/cjs/loader.js:727:14)
    at Module.require (internal/modules/cjs/loader.js:852:19) {
  code: 'MODULE_NOT_FOUND',requireStack: [
    '/app/node_modules/resolve/lib/async.js','/app/node_modules/resolve/index.js','/app/node_modules/liftoff/index.js','/app/node_modules/knex/bin/cli.js'
  ]
}

有人知道这里可能是什么问题吗？为什么我的node.js应用程序可以在本地计算机上运行，​​而在Heroku上却异常运行？

-编辑-

问题解决了。 axios导致了我的问题。我必须更改第三方集成的实现。