add_header Strict-Transport-Security "max-age=300" always;
add_header X-Content-Type-Options "nosniff" always;
add_header X-Frame-Options "DENY" always;
add_header Referrer-Policy "same-origin" always;
add_header Permissions-Policy "camera=(), microphone=(), geolocation=()" always;
add_header Content-Security-Policy "default-src 'self'; img-src 'self' data:; base-uri 'self'; frame-ancestors 'none'; form-action 'self'; object-src 'none'" always;