After they asked for the PESEL (Polish national identity number) I just stopped filling the form. It's sensitive personal data, you don't want to give it unless it's necessar and you have complete trust for requesting party.
I prefer zero-dependency single file executables. Elegant and easy to comprehend. Docker only adds another layer of abstraction and its advantages are questionable.
Who on Earth think onboadrding mail is a good idea? It's junk mail and nobody reads it. Never place there any important information - most users completely ignore them.
The only mail I expect is email address confirmation.