Set access_log to off but do log_not_found for robots.txt

dockerfiles/commul-customization/default-ssl

@@ -146,7 +146,7 @@ server {
   }
 
   # remove the robots and favicon from the logs
-#  location ~ /robots.txt$  { access_log off; log_not_found off; }
+  location ~ /robots.txt$  { access_log off; }
   location ~ ^/favicon.ico$ { access_log off; log_not_found off; }
 
   # this prevents hidden files (beginning with a period) from being served