Antennas is a Crystal port of tvhProxy which is a program that translates the Tvheadend API to emulate a HDHomeRun API. This is particularly useful to connect Plex's DVR feature to Tvheadend.
docker create \
--name=antennas \
-v <path/to/config>:/opt/antennas/config \
-p 5004:5004 \
thejf/antennas
This will mount a volume, set by yourself in path/to/config, that will need a config.yml to work. Example of a config.yml is available here, or below:
tvheadend_url: http://replace:me@x.x.x.x:9981
tvheadend_weight: 300
tuner_count: 6
Note, I'll eventually make this work with environment variables, Crystal is just not cooperating with me on this at the moment.