Refactor markdown.moon; add pandoc to Dockerfile; monkey-patch sitegen

markdown renderer

site.moon

@@ -73,6 +73,10 @@ extract_date = (source) -> string.match path.filename(source), "%d+%-%d%d%-%d%d"
 format_date = (str) -> date(str)\fmt "%b %d, %Y"
 publish_date = (path) -> format_date extract_date path
 
+os.execute [[
+moonc -t /usr/local/openresty/luajit/share/lua/5.1/sitegen/renderers/ markdown.moon
+]]
+
 sitegen.create =>
   @site_title = "WebDevCat.me · Catalin Mititiuc"
   @app_name = "stasis"