Komplettering

**Well done Dante!**

Dude! The instruction reads as:
> Because your solution can be implemented using any language, write in a README file of how to build and run your application [...].

I could search for how to build a Maven Java application, but that is not within my set of responsibilities. Please add some instructions.

Open the repository's README and add instructions for building and running this Maven Java application. Confirm that the README explains the commands a user needs to build and run the application without having to research Maven separately; no test file or other entry point is mentioned.

Written by the indexing model from the issue text.