Prerequisites

 [xmlrpcd]
 page_prefix=
  insert into users values ('USERNAME', 'SECRETPASSWORD', NULL, 'name@example.com', 1);

(Pre-)view the FITS images

The preview seen in the browser.

Security

rts2-xmlrpcd maps a browser request, e.g. http://your.system.tld::8889/preview/ to the root directory / trying to display all but only files with the extension .fits. That implies that the directory structure of the system and all FITS images therein are exposed to public view.