Our (paying) customer hardly ever configures ProGet in this manner, and we aren't exactly Linux experts so writing documentation on seemingly dozens of different ways on how to do this sort of thing is really tough for us.
I'd very much welcome your contribution to our documentation, it's on GitHub (just click "Propose an Edit" at the bottom): https://docs.inedo.com/docs/proget/installation/installation-guide/linux-docker
I want ProGet to be a great community tool, and hope you can help contribute to the Linux installation experience; thanks!