So, you may be wondering why there is no minecraft-paper Dockerfile, right?
Well, PaperMC has no API endpoint to fetch the latest jar.
They themselves discourage it, according to their documentations:
"This is intentional, as it had been primarily used to auto-update servers, which is highly discouraged"
I know I could work on a Dockerfile which automatically compiles Paper and so on just like I do with minecraft-spigot or make a few API request, but I'm simply not going to.
If you wish to work on said Dockerfile feel free to open a pull request.
So, there you have it, this is why there is no minecraft-paper Dockerfile in this repository.