location of collectd.conf file in docker container

Hi There,
I am building docker container for collectd-exporter,
https://hub.docker.com/r/prom/collectd-exporter/

I could n't find collectd.conf file in the container to add my apache instance Urls for monitoring apache server.
Also, please suggest if you can mount this conf file in my host where i am building docker container.

Thanks
Anka

