How to parameterize Dockerfile?

I'm creating a Dockerfile for our Spring Boot application. The application takes a couple of command line parameters. At the end of Dockfile:

CMD java -jar Application.jar --bucket=bucket.list --key=lost

But is it a best practice to hardcode the values for bucket and key in the Dockfile?

If it is ok, then I can live with that. Otherwise, I would like to know how to parameterize the Dockfile.

The application will be deployed on AWS, if that opens the door for more suggestions.