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Nginx
# Nginx — добавьте в блок server {}
add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
add_header Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline'" always;
add_header X-Frame-Options "SAMEORIGIN" always;
add_header X-Content-Type-Options "nosniff" always;
add_header X-XSS-Protection "1; mode=block" always;
add_header Referrer-Policy "strict-origin-when-cross-origin" always;
add_header Permissions-Policy "camera=(), microphone=(), geolocation=()" always;
add_header Cross-Origin-Opener-Policy "..." always;
add_header Cross-Origin-Resource-Policy "..." always;
add_header Cross-Origin-Embedder-Policy "..." always;

Apache
# Apache — добавьте в .htaccess
Header always set Strict-Transport-Security "max-age=31536000; includeSubDomains"
Header always set Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline'"
Header always set X-Frame-Options "SAMEORIGIN"
Header always set X-Content-Type-Options "nosniff"
Header always set X-XSS-Protection "1; mode=block"
Header always set Referrer-Policy "strict-origin-when-cross-origin"
Header always set Permissions-Policy "camera=(), microphone=(), geolocation=()"
Header always set Cross-Origin-Opener-Policy "..."
Header always set Cross-Origin-Resource-Policy "..."
Header always set Cross-Origin-Embedder-Policy "..."