Recently I was building a private hobby project where I wanted to use Heroku to deploy some Microservices and get some experience with it. Since I’m a Java enthusiast, I wanted to use a Multi-Module Maven project to also share some classes to the different microservices. So my mission was to deploy each submodule to a different Heroku app (I know this is completely against the nature of Microservices to code them all in the same language and have them in one big project like a Monolith – but I have my reasons). Getting started with Heroku was quite simple, because they have a very nice guide to setup and run your first app in the cloud. Unfortunately Heroku only supports one Procfile per project, therefore it’s not so easy to deploy multiple submodules to it. But there is way: You can use Config Variables. Let’s see step by step how to use this!