在Google Cloud App Engine中安装开发依赖关系

我正在尝试将我的React应用部署到Google Cloud App引擎。 我也添加了一个app.yaml文件。 它看起来像这样：

 // app.yaml runtime: nodejs env: flex 

现在，我想在部署之前使用webpack构build我的项目。 所以下面的文档 ，我已经添加了prestart脚本到package.json 。 现在我的脚本部分package.json看起来像这样：

  "scripts": { "build": "npm-run-all --parallel webpack-client-build webpack-server-build", "webpack-server-build": "NODE_ENV='development' webpack --config ./webpack/webpack.server.config.js --progress --colors --watch", "webpack-client-build": "NODE_ENV='development' webpack --config ./webpack/webpack.browser.config.js --progress --colors --watch", "build-prod": "npm-run-all webpack-client-build-prod webpack-server-build-prod", "webpack-server-build-prod": "webpack --config ./webpack/webpack.server.config.js -p", "webpack-client-build-prod": "webpack --config ./webpack/webpack.browser.config.js -p", "prestart": "npm run build-prod", "start": "pm2 start dist/main.js" }, 

我使用npm-run-all来构build服务器端和客户端的pacakges。 但正因为如此，我的构build失败了，如它所说的文档

 Note: Webpack must be listed in the dependencies of the package.json file, as by default devDependencies are not installed when the app is deployed to Google App Engine. 

如何安装节点开发依赖项以在Google云中部署Node应用程序？

谢谢 ：）