Load assets using a relative path

As per the discussion in ✨ Allow users to specify custom files that Test-only changes Active , I've created an issue/MR for loading the relative markdown assets.

This looks good. Obviously we cannot see the results here, as the pages job has not been run. We could make a temporary change to this projects .gitlab-ci.yml page rules so that the job is run in this MR, for verification before merging.

Not a blocker, but how will this impact local testing? https://project.pages.drupalcode.org/gitlab_templates/help/documentation...