* Add custom docker registry authentication
Uses DOCKER_USERNAME and DOCKER_PASSWORD as secrets provided into
the act cli.
Closes#527
Co-authored-by: Björn Brauer <zaubernerd@zaubernerd.de>
* Add test to check if pull authentication is filled in
* Update debug message to be more descriptive
Co-authored-by: Ryan (hackercat) <me@hackerc.at>
Co-authored-by: Björn Brauer <zaubernerd@zaubernerd.de>
Co-authored-by: Ryan (hackercat) <me@hackerc.at>