(add): rest of search form

webapp/src/app.html

@@ -3,7 +3,7 @@
 	<head>
 		<meta charset="utf-8" />
 		<meta name="viewport" content="width=device-width, initial-scale=1" />
-		<link rel="manifest" href="manifest.json">
+		<link rel="manifest" href="/manifest.json">
 		%sveltekit.head%
 	</head>
 	<body data-sveltekit-preload-data="hover">