do not add cache status on this request

docker/nginx/conf.d/client.conf

@@ -262,7 +262,6 @@ server {
 		proxy_cache_valid 200 30s; # cache only 200 responses and only for 30 seconds
 		proxy_cache_lock on; # queue cache requests for the same resource until it is fully cached
 		proxy_cache_bypass $cookie_nocache $arg_nocache; # add cache bypass option
-		add_header X-Proxy-Cache $upstream_cache_status; # add response header to indicate cache hits and misses
 
 		proxy_pass http://127.0.0.1/skynet/registry$is_args$args;
 	}