User-agent: Googlebot
Disallow: /app-files/

User-agent: bingbot
Disallow: /app-files/

User-agent: ia_archiver
Disallow: /app-files/

User-agent: ia_archiver-web.archive.org
Disallow: /app-files/

User-agent: ia_archiver/1.6
Disallow: /app-files/

User-agent: *
Disallow: /