Missing test case when handling docker context - continuation of the solution to fix 1759

[jjbustamante]

Summary

Pack could be executed as a binary in a container that mounts the docker sock, when I did it (testing the development binary to check other ticket) I noticed I was not able to run pack. It throws the following error:

ERROR: reading configuration file at '/root/.docker': open /root/.docker/config.json: no such file or directory

In this container the .docker folder doesn't exists and I was not handling that error correctly. This PR fixes this problem and also handles the case where the .docker folder exists but the config.json file doesn't, In such cases, pack should keep running with its normal execution.

Output

Before

ERROR: reading configuration file at '/root/.docker': open /root/.docker/config.json: no such file or directory

After

No error

Documentation

• Should this change be documented?
  • Yes, see #___
  • No

Related

Resolves #1759