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

data/conf/nginx/site.conf

@@ -7,6 +7,13 @@ map $http_x_forwarded_proto $client_req_scheme {
      https https;
 }
 
+map $sent_http_content_type $expires {
+        default off;
+        text/css 1d;
+        application/javascript 1d;
+        ~image/ 1d;
+}
+
 server {
   listen 80 default_server;
   listen [::]:80 default_server;
@@ -81,6 +88,7 @@ server {
     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
     proxy_set_header X-Real-IP $remote_addr;
     proxy_redirect off;
+    expires $expires;
   }
 
   location ~* ^/Autodiscover/Autodiscover.xml {
@@ -263,6 +271,7 @@ server {
     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
     proxy_set_header X-Real-IP $remote_addr;
     proxy_redirect off;
+    expires $expires;
   }
 
   location ~* ^/Autodiscover/Autodiscover.xml {