gitlab-ci: Re-use docker image from the main repo in forked repos
Instead of generating it from scratch in each forked repo. This should save time, energy and storage. (The xserver & xf86-video-amdgpu CI scripts do basically the same)
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Instead of generating it from scratch in each forked repo. This should save time, energy and storage. (The xserver & xf86-video-amdgpu CI scripts do basically the same)