feat: add description and keywords metadata to index

index.html

@@ -4,6 +4,10 @@
     <meta charset="UTF-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
 
+    <title>Jumble</title>
+    <meta name="description" content="A beautiful nostr client focused on browsing relay feeds">
+    <meta name="keywords" content="jumble, nostr, web, client, relay, feed, social, pwa, simple, clean">
+
     <meta name="apple-mobile-web-app-title" content="Jumble" />
     <link rel="apple-touch-icon" href="/apple-touch-icon.png">
     <link rel="icon" href="/favicon.ico" sizes="48x48">
@@ -22,7 +26,6 @@
       property="og:image"
       content="https://github.com/CodyTseng/jumble/blob/master/resources/og-image.png?raw=true"
     />
-    <title>Jumble</title>
     <style>
       body {
         background-color: #FFFFFF;