# Enable HSTS: tell browsers to always use HTTPS
add_header Strict-Transport-Security "max-age=31536000; includeSubdomains; preload" always;

# Set X-Frame-Options to deny to prevent clickjacking
add_header X-Frame-Options DENY always;

add_header X-Content-Type-Options nosniff always;

add_header Referrer-Policy strict-origin-when-cross-origin always;
add_header Cross-Origin-Opener-Policy same-origin always;