将Ionic2推送到heroku:无法获取/

我正试图将我的ionic2项目（作为一个web应用程序）推送到Heroku，部署是可以的，但是当我访问应用程序时，我有一个空白页面，上面写着“无法获取/”

我有一个express服务器，一个正确的Procfile，但我认为www/不是基于部署构建的。实际上，如果我在推送中包含我的www/文件夹，web应用程序将运行。。。（但我不想对我的www/文件夹进行版本设置）

这里是my package.json。我做错了什么？谢谢大家!

{
  "name": "ionic-hello-world",
  "author": "Ionic Framework",
  "homepage": "http://ionicframework.com/",
  "private": true,
  "main": "server.js",
  "scripts": {
    "clean": "ionic-app-scripts clean",
    "build": "ionic-app-scripts build",
    "ionic:build": "ionic-app-scripts build",
    "ionic:serve": "ionic-app-scripts serve",
    "start": "node server.js"
  },
  "dependencies": {
    "@angular/common": "2.2.1",
    "@angular/compiler": "2.2.1",
    "@angular/compiler-cli": "2.2.1",
    "@angular/core": "2.2.1",
    "@angular/forms": "2.2.1",
    "@angular/http": "2.2.1",
    "@angular/platform-browser": "2.2.1",
    "@angular/platform-browser-dynamic": "2.2.1",
    "@angular/platform-server": "2.2.1",
    "@ionic/storage": "1.1.6",
    "angular2-jwt": "^0.1.27",
    "auth0-lock": "^10.7.3",
    "express": "^4.14.1",
    "ionic-angular": "2.0.0-rc.4",
    "ionic-native": "2.2.11",
    "ionicons": "3.0.0",
    "rxjs": "5.0.0-beta.12",
    "zone.js": "0.6.26"
  },
  "devDependencies": {
    "@ionic/app-scripts": "^1.0.0",
    "typescript": "2.0.9",
    "sw-toolbox": "3.4.0"
  },
  "cordovaPlugins": [
    "cordova-plugin-whitelist",
    "cordova-plugin-statusbar",
    "cordova-plugin-console",
    "cordova-plugin-device",
    "cordova-plugin-splashscreen",
    "ionic-plugin-keyboard"
  ],
  "cordovaPlatforms": [],
  "description": "deals: An Ionic project"
}

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“postinstall”：“ionic应用程序脚本构建”解决了我的问题。非常感谢！你救了我！：D