Fauxton is part of couchdb, in fact it is the default user interface for 2.0. Most likely your fauxton is in
/usr/local/share/couchdb/www/fauxton
to know your configuration file exactly
http://localhost:5984/_utils/config.html
and find
__utils httpd_global_handlers, , couchdb. fauxton, fuaxton.
, . couchdb. github.