Add TLS v1.3 support (#11603)

Maintain TLS v1.2 compatibility (might want to drop this later) and add support for TLS v1.3

dist/nginx.conf

@@ -19,7 +19,7 @@ server {
   listen [::]:443 ssl http2;
   server_name example.com;
 
-  ssl_protocols TLSv1.2;
+  ssl_protocols TLSv1.2 TLSv1.3;
   ssl_ciphers HIGH:!MEDIUM:!LOW:!aNULL:!NULL:!SHA;
   ssl_prefer_server_ciphers on;
   ssl_session_cache shared:SSL:10m;