anchor.diff:      proxy_set_header   X-Forwarded-Proto https;
       proxy_set_header Host $http_host;
       proxy_redirect off;
  -    proxy_pass http://unicorn;
  +    proxy_pass http://unicorn_<%= fetch(:full_app_name) %>;
     }
   
     error_page 500 502 503 504 /500.html;
  
positive.code: 
  <% if fetch(:enable_ssl) %>
  server {
    server_name <%= fetch(:server_name) %>;
    listen 443;
    root <%= fetch(:deploy_to) %>/current/public;
  
    location ^~ /assets/ {
      gzip_static on;
  
negative.code:     add_header Cache-Control public;
    }
  
    try_files $uri/index.html $uri @unicorn;
    location @unicorn {
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
      proxy_set_header Host $http_host;
      proxy_redirect off;
  