Allow HTTP request to trigger dummy motion sensor
Instead of using the dummy button to trigger the motion detector via a HomeKit automation, I would like to trigger it via an HTTP request. This would allow me to use my Synology Surveillance Station to notify homebridge-camera-ffmpeg, which would in turn trigger its dummy motion Sensor, avoiding the need for any HomeKit configuration, while still being able to create motion notifications with a screenshot.

The HTTP request would include a param that identifies which device detected motion, e.g. `device=backyard`, which would correspond to a property in the configuration JSON on each camera entry.