Exclude the dummy book from search engines

Author: kornelski

first-edition/theme/index.hbs

@@ -5,6 +5,7 @@
         <meta charset="UTF-8">
         <title>{{ title }}</title>
         <meta content="text/html; charset=utf-8" http-equiv="Content-Type">
+        <meta name="robots" content="noindex,follow">
         <meta name="description" content="{{ description }}">
         <meta name="viewport" content="width=device-width, initial-scale=1">
         <meta name="theme-color" content="#ffffff" />