Add Instante brand on public pages

app/javascript/styles/mastodon/containers.scss

@@ -327,6 +327,18 @@ div#auth-bground > img {
       flex-wrap: nowrap;
     }
 
+    a.brand-instante {
+       display: flex;
+
+       img.small {
+         margin: auto 1em;
+         width: 3em;
+         position: relative;
+         top: -2px;
+       }
+
+     }
+
     .brand {
       display: block;
       padding: 15px;

app/views/layouts/public.html.haml

@@ -8,8 +8,8 @@
       .container
         %nav.header
           .nav-left
-            = link_to root_url, class: 'brand' do
-              %span='logo here'
+            %a.brand-instante{"href" => "/"}
+              %img.small{"src" => "/apple-touch-icon.png"}
 
             - unless whitelist_mode?
               = link_to t('directories.directory'), explore_path, class: 'nav-link optional' if Setting.profile_directory