Nginx Security Hardening: Secure Web Server Configuration

server_tokens off;
add_header X-Frame-Options "SAMEORIGIN" always;
add_header X-Content-Type-Options "nosniff" always;
add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
ssl_protocols TLSv1.2 TLSv1.3;