Printdown: write markdown, print document

Tried to print a document written as Markdown once in VS Code and couldn't. Seems so simple that nobody made it before, so behold: Printdown !

• paste or write Markdown
• let the server parse it as html
• print it thanks to a keen made CSS file
• profit !

Please note that this is a rough draft: CSS for printing could be optimized, parsing could be done client side, and maybe other things could be better... but please, be my guest and feel free to create your own.