Using Yaml Front Matter for custom templating

**Operation System**: `Windows`

**DocFX Version Used**: Not sure, forked https://github.com/docascode/docfx-seed

**Template used**: `custom`

Hello,

I am looking for documentation how to use YAML front matter metadata within the document template. Just as in Jekyll (https://jekyllrb.com/docs/front-matter/).

I am using DocFX for end-user documentation and plan to use YAML metadata to store article information such as Tags (categories), Author, Estimated reading time, Last Updated etc.

We chose DocFX as we wanted to have documentation similar to docs.microsoft.com.

Thanks in advance!