perf: tackle lighthouse issues

views/album.templ

@@ -9,7 +9,7 @@ templ AlbumPage(a data.Album) {
 	@layout(fmt.Sprintf("%s - %s", a.Artist, a.Name)) {
 		<div id="container">
 			<div id="metadata">
-				<img id="album-artwork" src={ data.ExtractImageURL(a.Image) }/>
+				<img id="album-artwork" src={ data.ExtractImageURL(a.Image) } alt="Album image"/>
 				<h2>{ a.Artist }</h2>
 				<h1>{ a.Name }</h1>
 			</div>