The OwnTracks Recorder is a lightweight program for storing and accessing location data published via MQTT (or HTTP) by the OwnTracks apps. OTR_PORT is the MQTT port number to connect to. It is set to 1883 by default. Set it to 0 to disable MQTT and run on HTTP only. For this docker container it is suggested to leave both OTR_HTTPHOST and OTR_HOST set to the default "localhost", otherwiser the continer won't be able to start. This container is set to be up and running in HTTP mode (MQTT disabled by default), see https://github.com/owntracks/recorder#configuration-file for the list of optional additional parameters (including those to configure MQTT). Recorder documentation: https://github.com/owntracks/recorder Recorder Docker documentation: https://github.com/owntracks/docker-recorder/