Export Markdown to PDF

Install dependencies

sudo apt-get install pandoc wkhtmltopdf

Export to PDF

pandoc README.md -o README.pdf --pdf-engine wkhtmltopdf \
  --css styles.css \
  -V margin-top=11mm \
  -V margin-bottom=11mm \
  -V margin-left=11mm \
  -V margin-right=11mm \

Css template

html, body {
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.5;
  font-size: 18px;
}
h1,h2,h3 {
  font-weight: bold;
}
h1 {
  padding-top: 0;
  margin-top: 0;
  border-bottom: 1px solid black;
}
h2 {
  padding-top: 15px;
  border-top: 1px solid black;
}
blockquote, code {
  padding: 0 1em;
  margin: 0;
  color: black !important;
  background-color: rgb(235, 235, 235);
}
.columnList ul{ margin: 0; }

To debug CSS styles, export to html instead by changing the extension ... -o README.html ...