Error when adding a module dependency

[tom-thorne]

The template works out of the box. However, as soon as you yarn add any dependency and use it in your code, you get a runtime error (se below).

This is solved by removing the package block in the serverless.yml file, which was excluding node_modules from the package.

I am not clear what the intention is here - should node_modules be excluded and some other setting or plugin is missing?

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/handler.js:3:16)
   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)