Merge pull request #567 from jodumont/patch-2

a little bit of security

data/conf/nginx/site.conf

@@ -1,3 +1,4 @@
+server_tokens off;
 # includes to http {
 proxy_cache_path /tmp levels=1:2 keys_zone=sogo:10m inactive=24h  max_size=1g;
 server_names_hash_bucket_size 64;
@@ -7,6 +8,7 @@ map $http_x_forwarded_proto $client_req_scheme {
      default $scheme;
      https https;
 }
+
 server {
   include /etc/nginx/conf.d/listen_ssl.active;
   include /etc/nginx/mime.types;
@@ -18,7 +20,17 @@ server {
   ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
   ssl_prefer_server_ciphers on;
   ssl_ciphers 'EDH+CAMELLIA:EDH+aRSA:EECDH+aRSA+AESGCM:EECDH+aRSA+SHA256:EECDH:+CAMELLIA128:+AES128:+SSLv3:!aNULL:!eNULL:!LOW:!3DES:!MD5:!EXP:!PSK:!DSS:!RC4:!SEED:!IDEA:!ECDSA:kEDH:CAMELLIA128-SHA:AES128-SHA';
-  add_header Strict-Transport-Security "max-age=15768000; includeSubDomains";
+
+  ssl_session_cache shared:SSL:50m;
+  ssl_session_timeout 1d;
+  ssl_session_tickets off;
+
+  add_header X-Frame-Options SAMEORIGIN;
+  add_header X-Content-Type-Options nosniff;
+  add_header X-XSS-Protection "1; mode=block";
+  add_header Referrer-Policy: no-referrer-when-downgrade;
+  add_header Strict-Transport-Security "max-age=15768000; includeSubDomains; preload";
+
   ssl_ecdh_curve secp384r1;
   index index.php index.html;
   include /etc/nginx/conf.d/server_name.active;