switch to pyinstaller onefolder

[ ] Have you checked to ensure there aren't other open Pull Requests for the same update/change?
[ ] Did you make your Pull Request on the dev branch?
[ ] Does your submission pass tests? make test
[ ] Have you lint your code locally prior to submission? make lint
[ ] Could you build and run the docker images successfully? make images
[ ] Could you create a running executable? make executable
[ ] Have you added an explanation of what your changes do and why you'd like to include them?
[ ] Have you written new tests for your changes, as applicable?
[ ] Have you successfully ran manual tests with your changes locally?

Der-Henning / tgtg