Add page meta tags for search and link previews

src/routes/+error.svelte

@@ -39,7 +39,7 @@
 </script>
 
 <div class="page">
-	<PageHeader command="curl {page.url.pathname}" title="Error {status}" />
+	<PageHeader command="curl {page.url.pathname}" title="Error {status}" meta={{ noIndex: true }} />
 
 	<pre class="ascii" class:server-error={status >= 500}>{asciiDigits.join('\n')}</pre>