Apollo 2 serverless tutorial dont work

[webchi]

Tried this tutorial but after deploing to aws lamabda get an error:

Unable to import module 'handler': Error
at Function.Module._resolveFilename (module.js:547:15)
at Function.Module._load (module.js:474:25)
at Module.require (module.js:596:17)
at require (internal/module.js:11:18)
at Object.<anonymous> (/var/task/node_modules/apollo-upload-server/lib/middleware.js:14:1)
at Module._compile (module.js:652:30)
at Object.Module._extensions..js (module.js:663:10)
at Module.load (module.js:565:32)
at tryModuleLoad (module.js:505:12)
at Function.Module._load (module.js:497:3)

Source code
@MeixnerTobias in slack found workaround solution to add "core-js": "^2.5.7" to package.json. That helped but maybe need fix tutorial or find better fix.

[sbrichardson]

related #1536 possibly

[yofriadi]

#1542

[abernix]

Closing as this is quite old, but happy to re-open if it continues to be a problem. (Though I suspect the underlying issue has ben resolved.)

Thanks for opening this originally!