PLEASE USE THE OFFICIAL LISTMONK HEROKU BUILDPACK
Listmonk is a self-hosted newsletter + mailing list manager. Visit the project's website at https://listmonk.app, or find the source code at https://github.com/knadh/listmonk
This Heroku deploy button allows you to deploy your own listmonk installation to Heroku.
Currently a PostgreSQL hobby add-on will be used. For production use with more than a few thousand subscribers you will need to upgrade the add-on.