https://github.com/Licsber/opencv-docker/runs/514244582?check_suite_focus=true
Push image:
Error parsing reference: "docker.pkg.github.com/Licsber/opencv-docker/opencv:latest" is not a valid repository/tag: invalid reference format: repository name must be lowercase
My username contains uppercase characters, this make push failed.
So fix the bug by change all uppercase in IMAGE_ID to lowercase.
