How to embed a file from github into an article on habré?

Question

Habr

I want to write an article for habr. The source material (the project itself) is on github. I would not like to do copy-paste. I would like to insert a file or part of a file from github into an article. Does anyone know if there is such a possibility?
There is a similar question on stackoverflow - Can I embed source files from GitH... .
There are several services that provide similar functionality. A couple of services offer to embed a javascript object - for example https://gist-it.appspot.com/ .

It doesn't work here either - embedding a file from github via the script tag:

But I'm not sure that this will work on habr - there is no html support in the habr editor.

Another standard for embedding is oEmbed . But when embedding a file in the text via the media element https://www.onlinetool.io/gitoembed/ in the text, I see only the file name and the name of the provider in the editor, I don’t see the content of the file.

How does embedding a file look like here via onlinetool.io/gitoembed and the oembed tag:

https://www.onlinetool.io/gitoembed/widget?url=htt...

Does anyone know the correct way to embed the contents of a github file into an article on habr?