put debug info

.gitlab-ci.yml

@@ -12,7 +12,8 @@ build:
     - pip3 install -r requirements.txt
     - pelican --version
     - pelican ./content/ --ignore-cache -o public/ -s publishconf.py -v
-    - ls public
+    - echo -e "commit=${CI_COMMIT_SHA}\nbuildDate=$(date -Iseconds)\n" > public/buildinfo.txt
+    - find public -type f
   artifacts:
     paths:
       - public