如何使用包裹在 Heroku 上部署网站？

如何解决如何使用包裹在 Heroku 上部署网站？

我想在使用 MERN 创建的 Heroku 上部署网站。我用包裹创建了它。当我在 Heroku 上部署时，它显示以下错误，我无法在 heroku 上部署它。 我该如何解决这个问题？ Error Image

Package.json

{
  "name": "TestProject","version": "1.0.0","description": "","main": "index.jsx","scripts": {
    "start": "parcel public/index.html"
  },"keywords": [],"author": "","license": "ISC","dependencies": {
    "@material-ui/core": "^4.11.3","axios": "^0.21.1","dropzone": "^5.9.2","parcel": "^2.0.0-beta.2","react": "^17.0.2","react-bootstrap": "^1.5.2","react-dom": "^17.0.2","react-router-dom": "^5.2.0"
  },"devDependencies": {
    "@parcel/transformer-image": "^2.0.0-beta.2","react-dropzone": "^11.3.2"
  }
}

解决方法

Heroku 会在那里寻找用于生产的构建命令。

"scripts": {
    "build": "npm run build","install": "npm install","start": "....",},