enable open file cache for main static root

Author: thestinger

nginx/nginx.conf

@@ -116,6 +116,9 @@ http {
         error_page 403 =404 /404;
         error_page 404 /404;
 
+        open_file_cache max=2048 inactive=1d;
+        open_file_cache_valid 1d;
+
         include snippets/security-headers.conf;
         add_header Cross-Origin-Resource-Policy "same-origin" always;
         gzip_static on;