use latexmk for build

.gitlab-ci.yml

@@ -3,11 +3,9 @@ image: registry.gitlab.com/islandoftex/images/texlive:latest
 build:
   script:
     - cd src
-    - pdflatex main.tex
+    - latexmk main.tex
-    - bibtex sources
-    - pdflatex main.tex
   after_script:
-    - cat latex/Ausarbeitung.log
+    - cat src/main.log
   artifacts:
     paths:
-      - latex/main.pdf
+      - src/main.pdf