Fix login pagename.

assets/login.html

@@ -3,7 +3,7 @@
   <head>
     <meta charset="utf-8">
     <meta name="viewport" content="width=device-width, initial-scale=1">
-    <title>Bootstrap HTML Example</title>
+    <title>Login</title>
     <link href="server_assets/bootstrap.css" rel="stylesheet">
     <style>
       .vert-padded {