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Great! That's how I like it! I feel you make valid tutorials, and that it wasn't your fault the Ubuntu repo was and is missing on GitHub. However, we could (in the near future) allow for non-GitHub repos as well, but currently that isn't the case. For now, we will allow the Linus Thorvalds repo on GitHub, but keep checking - on future tuts - what would be the proper repo per article.
You could always DM me at Discord (@scipio as well) so we can consult.