fix: container:purge job is not working properly
Working example: https://lab.frogg.it/froggit/test-services/-/jobs/190803
Example not working: https://lab.frogg.it/froggit/test-services/-/jobs/190784 => invalid checksum digest format
Link to the source code: https://lab.frogg.it/froggit/test-services/-/blob/main/.gitlab-ci/container.yml#L150