This has various things (in Makefile and the rc script) explicitly set to the default (MAINTAINER, daemon_flags, daemon_rtable, etc), please just leave those lines out.
The logging setup in this rc script will break with log rotation, it would be better to use the method done with prometheus/influxdb. The template files (html/css etc) installed directly to /var probably want installing to /usr/local/share/examples instead and copying with @sample instead, so if users modify them they can still update.