Create a .conf file in an existing influxdb instance

Hi

I have a rather simple question in my opinion: So far I used docker-influxdb setup without a configuration file. Now I need one in order to set up data gathering from collectd.

Is there a way to create a .conf file according to [Docker Hub] in a already running influxdb container (with multiple databases, which do not have specific conf-requirements) without breaking the running system?

thanks!