added an ls -R to see why we can't find images

.gitlab-ci.yml

@@ -81,6 +81,7 @@ build-userguide:
       git clone https://gitlab-ci-token:${CI_BUILD_TOKEN}@gitlab.com/${CI_PROJECT_NAMESPACE}/${CI_PROJECT_NAME}.wiki.git
       ## Because we use /img for our images, need to make them "visible" to the pdf conversion step
       find ./gridtracker.wiki/ -name '*.md' -type f -print0 | xargs -0 sed -E -i 's,(!\[.*])\(/img/,\1(img/,g'
+      ls -R
       ## Now let's make a pdf
       gwtc --verbose --toc gridtracker.wiki/Home.md --toctitle "GridTracker User's Guide" --logo-img gridtracker.wiki/img/GridTracker_logo.png --format all --output artifacts/docs/ --pdf-page-count gridtracker.wiki