ssl_certificate /letsencrypt/live/$ssl_server_name/fullchain.pem;
ssl_certificate_key /letsencrypt/live/$ssl_server_name/privkey.pem;
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';
ssl_prefer_server_ciphers on;
ssl_session_cache shared:SSL:10m;
ssl_session_timeout 1d;
ssl_session_tickets off;
ssl_dhparam /etc/nginx/dhparam.pem;
ssl_buffer_size 4k;