add benchmark result and fix Dockerfile names since it does not depends on architecture

bench/nginx.conf

@@ -59,7 +59,7 @@
 # 	return 503;
 # }
 	# localhost
-upstream localhost {
+upstream backend {
         ## Can be connected with "bench-nw" network
         # backend-nginx
         server 192.168.100.100:80;
@@ -69,6 +69,6 @@ server {
 	listen 80 ;
 	# access_log /var/log/nginx/access.log vhost;
 	location / {
-		proxy_pass http://localhost;
+		proxy_pass http://backend;
 }
 }