Run pdflatex twice to get TOC entries

.gitlab-ci.yml

@@ -4,6 +4,7 @@ build:
   stage: build
   script:
     - pdflatex -interaction=nonstopmode demo_tuhh_presentation
+    - pdflatex -interaction=nonstopmode demo_tuhh_presentation
   artifacts:
     paths:
       - demo_tuhh_presentation.pdf