no /etc/updatedb.conf is created, and there's no /etc/updatedb.example.conf
either - possible one could be:

----start----

##updatedb conf##

#PRUNEFS=""
#Allows you to specify which FS are pruned from the locate db, standard fstab fs
types are accepted
#
#PRUNEPATHS=""
#Allows you to specify paths which are to be pruned from the locate db, useful
for specifying /proc, /tmp, etc.
#
#NETPATHS""
#export NETPATHS
#Netpaths which *are* to be added to the locate db

----end----

I'm sure there are other options, not aware of where to fetch them :)