Fix unzoomed layout on mobile

lib/web/views/base_layout.html.eex

@@ -4,6 +4,8 @@
   <meta charset="utf-8" />
   <title><%= Mebe2.get_conf(:blog_name) %></title>
 
+  <meta name="viewport" content="width=device-width, initial-scale=1" />
+
   <%= if Mebe2.get_conf(:enable_feeds) do %>
     <link
       rel="alternate"