Setting config in file via env vars

[andycowan]

Is it possible to set a configuration value to an environment variable? For example

docker run -e BRIDGE_CLIENT_ID=something emqx/nanomq

bridges.mqtt.central {
client_id = ${BRIDGE_CLIENT_ID}
}

[JaylinYu]

NanoMQ does support configure settings with env, but BRIDGE_CLIENT_ID is not one of them...
If you would like to add a new env param, plz open a feature request.