Options -Indexes
DirectoryIndex index.php

<FilesMatch "^(config\.php|config\.sample\.php|database\.sql|README\.md)$">
    Require all denied
</FilesMatch>

<IfModule mod_headers.c>
    Header always set X-Frame-Options "SAMEORIGIN"
    Header always set X-Content-Type-Options "nosniff"
    Header always set Referrer-Policy "strict-origin-when-cross-origin"
</IfModule>
