This is a very simple approach building a homematic (rfd) to mqtt-smarthome bridge. This implementation dispenses completely with features like rega, homematic-ip and currently even collecting and building a paramsetDescription database (see Homematic API for details).
This way you will get the slimmest possible bridge, at the expense of a slightly more complex usability. You can dump your paramsetDescription for reference with my hmGetInfo tool.
docker run -d --restart=always --name=hm \
-p 2126:2126 \
dersimn/simplehmrfd2mqtt \
--ccu-address 10.1.1.112 \
--init-address 10.1.1.50 \
--mqtt-url mqtt://10.1.1.50 \
--filter-blacklist "^PARTY_"