Custom start-up command for Azure Node.js Web app (ES2015/babel)?
According your issue, please modify your start npm script to node ./node_modules/babel-cli/bin/babel-node.js index.js on Azure Web Apps.
Here is the content in test package.json:
{ "name": "website", "description": "A basic website", "version": "1.0.0", "engines": { "node": "5.9.1", "npm": "3.7.3" }, "scripts": { "start": "node ./node_modules/babel-cli/bin/babel-node.js index.js" }, "dependencies": { "babel-preset-es2015": "^6.6.0", "babel-cli": "^6.0.0" }}Meanwhile if you need a higher Node.js version, you can specify in package.json, refer to https://azure.microsoft.com/en-us/documentation/articles/nodejs-specify-node-version-azure-apps/ for more.
Just as what Gary said, you need to update your package.json using the command below.
"scripts": { "start": "node ./node_modules/babel-cli/bin/babel-node.js index.js" }