The wrong robots.txt file is being returned when requesting the robots.txt file on our staging and prototype instances:

https://esg.prototype.ucar.edu/robots.txt
https://cadis.prototype.ucar.edu/robots.txt
https://esg.staging.ucar.edu/robots.txt
https://cadis.staging.ucar.edu/robots.txt

What should be returned is a blank, disallow file:

#
# basic do not allow
#
User-agent: *
Disallow: /