Allow user override for image keyword
What does this MR do?
closes gitlab-runner#2750 (closed)
What are the relevant issue numbers?
Does this MR meet the acceptance criteria?
-
Changelog entry added, if necessary -
Documentation created/updated -
Tests added for this feature/bug -
Conforms to the code review guidelines -
Conforms to the merge request performance guidelines -
Conforms to the style guides -
Conforms to the database guides
Edited by Shinya Maeda