I typically specify these things in the Dockerfile - if the end user wants to modify the Dockerfile because they prefer Alpine over Debian... they've now taken responsibility of maintaining their customized Dockerfile and ensuring that everything runs as expected. This doesn't seem like something that would be encountered with any frequency in my experience, and you would technically have the same problem with or without Docker in the mix.
In the professional world, your end user is either :
- someone without the skills to make a Dockerfile
- another team who has not the responsability to integrate your work
The packager of an application is part of the project's team. It's not up to the user to package your application.
