TDT webpack session
bin/webpack
-> https://github.com/rails/webpacker/blob/master/lib/webpacker/webpack_runner.rb
-> https://github.com/rails/webpacker/blob/master/lib/webpacker/runner.rb
Finally what it is running is
WEBPACKER_CONFIG="config/webpacker.yml" ./node_modules/.bin/webpack --config config/webpack/development.js
-> https://github.com/rails/webpacker/blob/master/package/environments/development.js -> https://github.com/rails/webpacker/blob/master/package/environments/base.js -> https://github.com/rails/webpacker/tree/master/package/rules