This is an intro that runs in AppContent.
content.md
# Intro
This is for adding new content (currently just an upload link to test uploading):
`[new-content]`
[Test link to Mars wikipedia page](https://en.wikipedia.org/wiki/Mars)
thumbnail.svg
<svg viewBox="0 0 128 128" xmlns="http://www.w3.org/2000/svg">
<style>
svg {
background-color: #111;
}
text {
font: 40px sans-serif;
fill: #efe;
}
</style>
<g transform="translate(2 4)">
<text x="20" y="45">intro</text>
</g>
</svg>