NOTE: this is a fork from https://github.com/mantisadnetwork/heroku-buildpack-maxmind. It only deals with the free downloadable databases from MaxMind.
Ensure your application has the latest copy of MaxMind's GeoLite2 free downloadable databases when deploying. Ideally, you should have a way to restart your application to make sure this build back happens often enough (if you deploy daily/weekly, you have nothing to worry about).
The database file(s) is saved to a Heroku cache directory that is persisted across builds. If the database file does not exist, or is older than a day, a new copy is downloaded and moved to your project before deployment. All database files are stored in the root of your project when deployed.
Follow the instructions at https://github.com/ddollar/heroku-buildpack-multi for using multiple build packs. Simply add this repository to this list and voila!
Copy the snippet above into CLI.