module-nginx/templates/vhost/vhost_location_proxy.erb

  location <%= location %> {
<% if @location_cfg_prepend -%><% location_cfg_prepend.each do |key,value| -%>
    <%= key %>         <%= value %>;<% end -%><% end -%>
    proxy_pass         <%= proxy %>;
    proxy_read_timeout <%= proxy_read_timeout %>;
<% if @location_cfg_append -%><% location_cfg_append.each do |key,value| -%>
    <%= key %>         <%= value %>;<% end -%><% end -%>
  }