- add favicons

- make html more valid

launch.html

@@ -4,7 +4,10 @@
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>Jitsi Meeting</title>
-
+    <link rel='shortlink' href='https://meet.bnvb.eu/' />
+    <link href="https://meet.bnvb.eu/assets/favicon.ico" rel="alternate icon">
+    <link href="https://meet.bnvb.eu/assets/apple-touch-icon.png" rel="apple-touch-icon" sizes="180x180">
+    <link href="https://meet.bnvb.eu/assets/favicon.svg" rel="icon" type="image/svg+xml">
     <style>
       :root {
         color-scheme: light;
@@ -318,7 +321,7 @@
   <body>
     <nav class="navbar">
       <div id="logoBar" class="logo-bar hidden">
-        <img id="logoImage" src="" alt="Logo">
+        <img id="logoImage" src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" alt="Logo">
       </div>
       <div class="nav-actions">
       <a class="button secondary" href="https://www.bnvb-ingenieure.de/impressum" target="_blank" rel="noopener noreferrer" data-i18n="impressum">