Show what links to a page
uses
20 Backlinks
Add a "Linked from" list to the post layout:
{page.backlinks.length > 0 && <aside>
<h2>Linked from</h2>
<ul>{page.backlinks.map(p => <li><a href={p.path}>{p.title}</a></li>)}</ul>
</aside>}
Only links in page bodies count, not nav or footer links, so the list shows
real references. Set siteURL if your posts link to each other with full
URLs. See Backlinks.
