Support *.md.heex?

[ryan-senn]

I haven't put any research into this yet, so I'm not sure what it would take. Mainly creating this issue to see if this has been explored or not.

It would be really cool if we could use verified routes etc. by having the markdown files use MyAppWeb, :html for example. I often link from one page (or article in my case) to other pages, so having the compiler check the links would be pretty nice.

[jsonmaur]

I did look into this at one point and it's something I want to support in the future. Don't know how much sense it makes to support .md.heex files since the HEEx engine is meant for HTML templates rather than markdown... but supporting basic EEx compilation would allow you to do useful things like this:

[Foobar](<%= ~p"/foobar" %>)