Add cookbook for static asset hosting

Configures assets.kosmos.org, only for webfont hosting for now.

site-cookbooks/kosmos_assets/templates/nginx_conf_assets.erb

@@ -0,0 +1,25 @@
+<% if File.exist?(@ssl_cert) && File.exist?(@ssl_key) -%>
+# Generated by Chef
+
+server {
+  listen 443 ssl http2;
+  server_name <%= @domain %>;
+
+  root /var/www/<%= @domain %>/site;
+
+  access_log off;
+  gzip_static on;
+  gzip_comp_level 5;
+
+  location ~* .(css)$ {
+    expires 1d;
+  }
+
+  location ~* .(woff|woff2)$ {
+    expires max;
+  }
+
+  ssl_certificate     <%= @ssl_cert %>;
+  ssl_certificate_key <%= @ssl_key %>;
+}
+<% end -%>