Add meta descriptions, fix blog post time for uses post

src/_includes/base.njk

@@ -32,12 +32,14 @@
 		<link rel="me" href="https://social.lol/@lewis">
 		<link rel="me" href="https://github.com/LewisDaleUK">
 
+		<link rel="canonical" href="{{ metadata.site.url }}{{ page.url }}">
 		<link rel="webmention" href="https://webmention.io/lewisdale.dev/webmention">
 		<meta name="viewport" content="width=device-width, initial-scale=1">
 		<meta name="generator" content="eleventy">
+		<meta name="color-scheme" content="light dark">
 
 		<meta name="author" content="{{ metadata.author.name }}">
-		<meta name="description" content="{{ description }}">
+		<meta name="description" content="{{ excerpt if excerpt else description }}">
 		{% ogImage "./src/_includes/components/ogImage.njk", { title: pageTitle or title, subTitle: description } %}
 	</head>
 	<body>