Read data from app.properties gluon build issue

Question

I have a problem using the Gluon FX plugin with a JavaFX application. I need to build an executable .exe file. I have app.properties in my project, but the final application looks like the configuration from the app.properties are not present; app.properties file is located at the root of the project.

I build my sources with mvn gluonfx:build. I have tried mvn gluonfx:runagent before mvn gluonfx:build, but the result is same.

How to add configuration to my app? Are there other ways to set configuration variables and build .exe? If you need more information to help, just let me know.

P.S: This is my first post on StackOverflow. Please excuse me for any mistake I have made in posting the question.