Update Packer to 1.5.6

2 jobs from master in 43 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
failed #15873
build_image

00:00:43

failed #15872
build_image

00:00:51

 
Name Stage Failure
failed
build_image Test
WARNING! Using --password via the CLI is insecure. Use --password-stdin.
WARNING! Your password will be stored unencrypted in /root/.docker/config.json.
Configure a credential helper to remove this warning. See
https://docs.docker.com/engine/reference/commandline/login/#credentials-store

Login Succeeded
$ docker build -t docker.steamhaus.co.uk/steamhaus/gitlab_ci_container .
Cannot connect to the Docker daemon at tcp://docker:2375. Is the docker daemon running?
ERROR: Job failed: exit code 1