[GFM] Alerts

[sanpii]

https://docs.github.com/en/get-started/writing-on-github/getting-started-with-writing-and-formatting-on-github/basic-writing-and-formatting-syntax#alerts

[gjtorikian]

This project aims to be GFM-spec compliant and is unlikely to add additional extensions/features outside of it. You can try using an HTML postprocessor to decorate the final HTML however you like.