what am i missing?
The only web app I find supporting md2pdf is cv.ftqq.com. But it is not possible to customize themes in it. I want to make the theme customizable.
So I build this one
About the codemirror css, it is there because this editor uses it to highlight markdown code
see also another discussion here on HN 
And actually, there is a more related discussion here. Someone has built a md2resume tool 3 years ago but it is not maintained anymore. It inspired me a lot