Added expires directive and map to nginx, allowing browser to cache rspamd JS,CSS and image files.

data/conf/nginx/site.conf

@@ -9,9 +9,11 @@ map $http_x_forwarded_proto $client_req_scheme {
 
 map $sent_http_content_type $expires {
         default off;
+        text/html off;
         text/css 1d;
         application/javascript 1d;
-        ~image/ 1d;
+        application/json off;
+        image/png       1d;
 }
 
 server {