3e953ad8d2
this version will run with npm start, but when attempting to run the built version behind nginx, it appears to have issues
caller-callsite 
Get the callsite of the caller function
Install
$ npm install --save caller-callsite
Usage
// foo.js
const callerCallsite = require('caller-callsite');
module.exports = () => {
console.log(callerCallsite().getFileName());
//=> '/Users/sindresorhus/dev/unicorn/bar.js'
}
// bar.js
const foo = require('./foo');
foo();
API
callerCallsite()
Returns a callsite object.
License
MIT © Sindre Sorhus