Discourse prevents you from using various file types, presumably for security reasons. Shell files for instance. Python files. Executables (like timimi offshoots for example).
It would be useful if we could bundle everything into a zip file and then be able to post it. This should provide a reasonable safeguard against malicious code, since forum members would have to download it, unarchive it, approve it for running, and run it. Kind of hard to do all that by accident.