Following a standard set of front matter tags in the markdown

[kosperera]

Hashnode should follow a standard set of front-matter tags so it's quite compatible with jekyll and other markdown parsers as well as to republish on other platforms.

For instance:

• cover_url instead of cover
• canonical_url instead of canonical
• published instead of ignorePost
• description instead of subtitle

[theevilhead]

Hi @kosalanuwan, Thanks for the feedback. We will work on this to support them in a backward-compatible way.