change expected port number; add docs about markdown description lists; various cleanup

layouts/preview-color-themes.html

@@ -122,7 +122,6 @@
 	</script>
 </header>
 
-<div id="root">
 {{> breadcrumb.html }}
 
 <main>
@@ -133,7 +132,6 @@
 	<p class="left">Built with docs2website at <time datetime="{{ build_time.iso }}">{{ build_time.rfc2822 }}</time></p>
 	<p class="right">Copyright 2023 James Brumond</p>
 </footer>
-</div>
 
 </body>
 </html>