There's a closed pull request on the void-packages repository

fiche: enable configuration via a conf file
https://github.com/void-linux/void-packages/pull/17369

Description:
`fiche` does not have any configuration file
and is configured through it's command line
arguments. As with other runscripts for similar
services sourcing an optional `conf` file for
those options is better than having to edit the
runscript.