Google App Engine - 使用相同的 app.yaml 部署不同的文件夹

我有这个文件夹树：

这是我的实际app.yaml：

runtime: nodejs
env: flex

manual_scaling:
  instances: 1
resources:
  cpu: 1
  memory_gb: 0.5
  disk_size_gb: 10

handlers:
  - url: /api/.*
    static_files: server/server.js
    upload: server/server.js
  - url: /
    static_files: www/build/index.html
    upload: www/build/index.html
  - url: /
    static_dir: www/build

但总是，当我尝试使用以下命令部署应用程序时：gcloud app deploy --stop-previous-version进程结束，出现此错误：

第 0 步：应用程序检测失败：错误：node.js 检查器：“package.json”的“scripts”部分中的“start”和“server.js”文件均未找到。

该server/package.json是：

{
  "name": "server",
  "version": "1.5.2",
  "engines": {
    "node": "13.x"
  },
  "main": "server.js",
  "description": "ConstaFAST server",
  "scripts": {
    "start": "node server.js"
  },
  "license": "MIT",
  "dependencies": {
    "@hapi/joi": "^16.1.7",
    "base64-img": "^1.0.4",
    "bcryptjs": "^2.4.3",
    "body-parser": "^1.19.0",
    "dotenv": "^8.2.0",
    "express": "^4.17.1",
    "generate-password": "^1.4.2",
    "jsonwebtoken": "^8.5.1",
    "mongoose": "^5.8.4",
    "nodemailer": "^6.4.2",
    "pdfkit": "^0.11.0",
    "qrcode": "^1.4.4"
  },
  "devDependencies": {
    "morgan": "^1.9.1"
  }
}

这www/package.json是：

{
  "name": "www",
  "version": "0.1.6",
  "private": true,
  "engines": {
    "node": "13.x"
  },
  "dependencies": {
    "@material-ui/core": "^4.8.2",
    "@material-ui/icons": "^4.5.1",
    "bootstrap": "^4.4.1",
    "formik": "^2.1.1",
    "jspdf": "^1.5.3",
    "qrcode": "^1.4.4",
    "qrcode.react": "^1.0.0",
    "react": "^16.11.0",
    "react-bootstrap": "^1.0.0-beta.14",
    "react-dom": "^16.11.0",
    "react-router": "^5.1.2",
    "react-router-dom": "^5.1.2",
    "react-scripts": "3.3.0",
    "react-stripe-elements": "^6.0.1",
    "yup": "^0.28.0"
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test",
    "eject": "react-scripts eject"
  },
  "browserslist": {
    "production": [
      ">0.2%",
      "not dead",
      "not op_mini all"
    ],
    "development": [
      "last 1 chrome version",
      "last 1 firefox version",
      "last 1 safari version"
    ]
  }
}

最后，内容server/server.js是：

const express = require('express');
const app = express();
const path = require('path');
const bodyParser = require('body-parser');
const mongoose = require('mongoose');
require('dotenv').config()

const agencyRoutes = require('./api/routes/agency');
const companyRoutes = require('./api/routes/company');
const userRoutes = require('./api/routes/user');
const qrcodeRoutes = require('./api/routes/qrcode');
const vehicleRoutes = require('./api/routes/vehicle');
const writerRoutes = require('./api/routes/writer');

const port = process.env.PORT || 8080;

mongoose.connect(String(process.env.DB_CONNECT), {
  useCreateIndex: true,
  useNewUrlParser: true,
  useUnifiedTopology: true
}, () => console.log('Connect to the database'));

mongoose.Promise = global.Promise;

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

app.use( (req, res, next) => {
  res.header('Access-Control-Allow-Origin', 'https://constafast.cf');
  res.header(
    'Access-Control-Allow-Headers',
    'Origin, X-Requested-With, Content-Type, Accept, Authorization'
    );
  res.header('Connection', 'Keep-Alive');

  if ( req.method === 'OPTIONS' ) {
    res.header('Access-Control-Allow-Methods', 'PUT, POST, PATCH, DELETE, GET');
    return res.status(200).json({});
  }

  next();
});

app.use(express.static(path.resolve(__dirname, '../www', 'build')));

app.use('/api/agency', agencyRoutes);
app.use('/api/company', companyRoutes);
app.use('/api/user', userRoutes);
app.use('/api/qrcode', qrcodeRoutes);
app.use('/api/vehicle', vehicleRoutes);
app.use('/api/writer', writerRoutes);

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

app.use( (req, res, next) => {
  const error = new Error('Not found');
  error.status = 404;
  next(error);
});

app.use( (error, req, res, next) => {
  res.status(error.status || 500);
  res.json({
    error: {
      message: error.message
    }
  });
});

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