Issue with Relayer in docker

Issue with Relayer in docker with latest instruction.

Step 7/7 : ENTRYPOINT python launch -k $PRIVATE_KEY
 ---> Running in 9fda60ff925e
Removing intermediate container 9fda60ff925e
 ---> 5a17df46e2f0
Successfully built 5a17df46e2f0
Successfully tagged bifrost-relayer:latest
bifrost@mer:~/bifrost-relayer$ docker run -d --name relayer bifrost-relayer
bifrost@mer:~/bifrost-relayer$ docker logs -f relayer
usage: [-h] [-p PASSWORD] [-s PEM] [-k EXISTINGKEY]
                           [-a ANALYZE]
                           command error: argument -k/--existingKey: expected one argument

Hey, open Dockerfile and add needed key here

I have key in Docker now(it’s not mentioned in documentation) and have it in command next after build
docker run -d --name relayer --network host -e PRIVATE_KEY=HERE_MY_PRIVATE_KEY bifrost-relayer

bifrost@mer:~/bifrost-relayer$ docker logs -f relayer
Traceback (most recent call last):
  File "", line 105, in <module>
  File "", line 68, in main
    relayer = Relayer.init_from_config_files(
  File "/app/relayer/", line 59, in init_from_config_files
    private_config_dict = json.load(f)
  File "/usr/local/lib/python3.8/json/", line 293, in load
    return loads(,
  File "/usr/local/lib/python3.8/json/", line 357, in loads
    return _default_decoder.decode(s)
  File "/usr/local/lib/python3.8/json/", line 337, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/usr/local/lib/python3.8/json/", line 355, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

Please remove the comments in the first line of your configuration file. We have updated our manual and more details or on this page. Thanks

Yeah, it was the solution, forgot to update it here.
Thank you.