services/pkg/nginx: update ssl conf based on recommendations from mozilla

https://ssl-config.mozilla.org/#server=nginx&version=1.28.0&config=intermediate&openssl=3.5.0&hsts=false&guideline=5.7

Author: classabbyamp

services/pkg/nginx/ssl.conf

@@ -7,7 +7,8 @@ ssl_dhparam /etc/nginx/dhparam.pem;
 
 # intermediate configuration
 ssl_protocols TLSv1.2 TLSv1.3;
-ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384;
+ssl_ecdh_curve X25519:prime256v1:secp384r1;
+ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:DHE-RSA-CHACHA20-POLY1305;
 ssl_prefer_server_ciphers off;
 
 # OCSP stapling