Fix CI issues

.gitlab-ci.yml

@@ -59,7 +59,7 @@ pages:
     - documentation  # Label for the job to be picked up by appropriate runners
   before_script:
     # Install pipenv to manage Python dependencies
-    - apk update && apk --no-cache add doxygen graphviz
+    - apk update && apk --no-cache add graphviz
     - pip install pipenv
     - pipenv install  # Install the dependencies from the Pipfile
     - pipenv run pip install mkdoxy  # Install the mkdoxy plugin if needed