anchor.diff:  }
   
   
  -server {
  -  # enable one of the following if you're on Linux or FreeBSD
  -  listen 80; # for Linux
  -
  -  client_max_body_size 4G;
  -  server_name <%= fetch(:server_name) %>;
  -
  -  access_log <%= shared_path %>/log/nginx_access.log;
  -  error_log <%= shared_path %>/log/nginx_error.log error;
  -
  -  keepalive_timeout 5;
  -  if ($host == 'yuxian.me' ) {
  -     rewrite ^/(.*)$ http://www.yuxian.me/$1 permanent;
  -  }
  -
  -}
positive.code: 
    # path for static files
    root <%= current_path %>/public;
  
    location  / {
        gzip on;
  
negative.code:   listen 80; # for Linux
  
    client_max_body_size 4G;
    server_name <%= fetch(:server_name) %> www.<%= fetch(:server_name) %>;
  
    access_log <%= shared_path %>/log/nginx_access.log;
    error_log <%= shared_path %>/log/nginx_error.log error;
  