Attaching an nfc reader to the beaglebone. In my case a cheap one called COOQROBOT which I think is pn532 variant.
I installed both libnfc and nfc-eventd from source. The ususal ./configure; make ; sudo make install. ( You might need to follow this with a ldconfig -v to get the library picked up )
Now you can start a service that monitors your nfc reader for new tags. Just drop the following into /etc/systemd/system/nfceventd.service and run sudo systemd daemon-reload.
Now you can start the service with systemctl start nfceventd.service. And look at errors and output with systemctl status nfceventd.service.
By default the config for nfc-eventd just saves the events to /tmp/nfc-eventd. If you edit /usr/local/etc/nfc-eventd.conf you can change what this now does. So it could for instance send those events to your node-red server via mqtt.