:arrow_up: Bump webpacker from 4.0.2 to 4.0.4 (#614)
:arrow_up: Bump webpacker from 4.0.2 to 4.0.4 (#614)

Bumps [webpacker](https://github.com/rails/webpacker) from 4.0.2 to 4.0.4.
- [Release notes](https://github.com/rails/webpacker/releases)
- [Changelog](https://github.com/rails/webpacker/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rails/webpacker/compare/v4.0.2...v4.0.4)
ledermann/docker-rails,ledermann/docker-rails,ledermann/docker-rails,ledermann/docker-rails