Heroku Build 上的 MERN 堆栈在 heroku-postbuild 失败

如何解决Heroku Build 上的 MERN 堆栈在 heroku-postbuild 失败

这是我收到的错误消息：

-----> Build
       Running heroku-postbuild
       
       > syllame@1.0.0 heroku-postbuild /tmp/build_ded3c540_
       > npm install --prefix client && npm run build && --prefix client
       
       
       > core-js@2.6.12 postinstall /tmp/build_ded3c540_/client/node_modules/babel-runtime/node_modules/core-js
       > node -e "try{require('./postinstall')}catch(e){}"
       
       
       > core-js@3.8.2 postinstall /tmp/build_ded3c540_/client/node_modules/core-js
       > node -e "try{require('./postinstall')}catch(e){}"
       
       
       > core-js-pure@3.8.1 postinstall /tmp/build_ded3c540_/client/node_modules/core-js-pure
       > node -e "try{require('./postinstall')}catch(e){}"
       
       
       > ejs@2.7.4 postinstall /tmp/build_ded3c540_/client/node_modules/ejs
       > node ./postinstall.js
       
       added 1949 packages from 765 contributors and audited 1953 packages in 46.583s
       
       125 packages are looking for funding
         run `npm fund` for details
       
       found 0 vulnerabilities
       
sh: 1: --prefix: not found

npm ERR! code ELIFECYCLE

npm ERR! syscall spawn

npm ERR! file sh

npm ERR! errno ENOENT

npm ERR! syllame@1.0.0 heroku-postbuild: `npm install --prefix client && npm run build && --prefix client`

npm ERR! spawn ENOENT

npm ERR! 

npm ERR! Failed at the syllame@1.0.0 heroku-postbuild script.

npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:

npm ERR!     /tmp/npmcache.JbA0H/_logs/2021-01-03T20_51_10_460Z-debug.log

-----> Build failed
       
       We're sorry this build is failing! You can troubleshoot common issues here:
       https://devcenter.heroku.com/articles/troubleshooting-node-deploys
       
       Some possible problems:
       
       - node_modules checked into source control
         https://devcenter.heroku.com/articles/node-best-practices#only-git-the-important-bits
       
       - Node version not specified in package.json
         https://devcenter.heroku.com/articles/nodejs-support#specifying-a-node-js-version
       
       Love,Heroku
       
 !     Push rejected,failed to compile Node.js app.
 !     Push failed

以上是npm安装成功后的Heroku日志。我尝试删除客户端中隐藏的 .git 文件夹，但没有（是的，我也检查了“显示隐藏文件：Windows 资源管理器中的选项”）。我还尝试通过其他堆栈流教程多次提交和重新提交无济于事。我已经卡了一个星期，最后“放弃”了，这就是我在这里问这个问题的原因。 我还尝试使用以下内容：“heroku-postbuild”：“NPM_CONFIG_PRODUCTION=false npm install --prefix client && npm run build && --prefix client

那还是不行。该应用程序在 localhost/ 本地环境中功能齐全。 我什至尝试完全删除客户端文件夹。还是一样的错误。 在 package.json 的“engines”中定义 node 和 npm 也没有任何改变。 我想不出别的了。 我尝试使用 Heroku CLI，同样的问题。 我正在使用 Visual Studio 代码。

我的项目结构：

app/
 client/

 config/
 models/
 node_modules
 routes/
 validation
 LICENSE
 package-lock.json
 package.json
 README.md
 server.js

这是我的 server.js 代码：

const express = require ('express'); //node.js flexible web application framework that provides features for web applications
const mongoose = require ("mongoose"); // Mongoose is a MongoDB object modeling toold designed to work in an asynchronous environment,supporting both promises and callbacks
const bodyParser = require ("body-parser"); //node.js body parsing middleware
const passport = require("passport"); //used to authenticate requests,via plugins known as  ~strategies~.
const path = require("path");

const users = require("./routes/api/users");

const app = express();
//body parser middleware

app.use(
    bodyParser.urlencoded({
        extended: false
    })
);
app.use(bodyParser.json());

//configure our database connection
const db = require("./config/keys").mongoURI;

//actually connecting to our database
mongoose
    .connect(
        db,{ useNewUrlParser: true,useUnifiedTopology: true}
    )
    .then( () => console.log("Mongo DB connected successfully!"))
    .catch(err => console.log(err));

//middleware for passport
app.use(passport.initialize());

//configure the passport
require("./config/passport")(passport);

//our routes
app.use("/api/users",users);

//serve our static assets (build folder if we are in production)

if(process.env.NODE_ENV=== 'production') {
    //set static folder
    app.use(express.static('client/build'))


    app.get('*',(req,res) => {
        res.sendFile(path.resolve(__dirname,'client','build','index.html'));

    })
}


    const port = process.env.PORT || 5000; //process.env.PORT is heroku's port if you choose to deploy the app

    app.listen(port,() => console.log(`Server up and running on port ${port} !`));

和我在服务器端的 package.json

{
  "name": "syllame","version": "1.0.0","description": "","main": "server.js","scripts": {
    "client-install": "npm install --prefix client","start": "node server.js","server": "nodemon server.js","client": "npm start --prefix client","dev": "concurrently \"npm run server\" \"npm run client\"","heroku-postbuild" : "NPM_CONFIG_PRODUCTION=false npm install --prefix client && npm run build && --prefix client"
  },"repository": {
    "type": "git","url": "git+https://github.com/bbobbylon/syllame.git"
  },"author": "Robert C. Oliver,Jr. and Colin J. McClintic","license": "MIT","bugs": {
    "url": "https://github.com/bbobbylon/syllame/issues"
  },"homepage": "https://github.com/bbobbylon/syllame#readme","devDependencies": {
    "nodemon": "^2.0.6"
  },"dependencies": {
    "bcryptjs": "^2.4.3","body-parser": "^1.19.0","concurrently": "^5.3.0","express": "^4.17.1","is-empty": "^1.2.0","jsonwebtoken": "^8.5.1","mongoose": "^5.11.9","passport": "^0.4.1","passport-jwt": "^4.0.0","validator": "^13.5.2"
  }
}