The example for docker_config_file is not correct

[julien-carsique-sonarsource]

Expected Behavior

The following snippet from the documentation should allow customizing the docker configuration.

task:
  environment:
    DOCKER_CONFIG: ENCRYPTED[qwerty]
  docker_config_file:
    path: /root/.docker/config
    variable_name: DOCKER_CONFIG

Real Behavior

DOCKER_CONFIG is a reserved keyword by Docker. Using it breaks the Docker configuration resolution.
The correct file path is /root/.docker/config.json.

Related Info

This is a (tick one of the following):

• Website issue
  • Link to page: https://cirrus-ci.org/guide/writing-tasks/#file-instruction
• Task issue
  • OS: (Docker, macOS, Windows, FreeBSD)
  • Task name:
  • Script/cache name (if applies):