Update .gitlab-ci.yml file

.gitlab-ci.yml

 stages:
-  - build1
-  - build2
+  - build
   - deploy
 
 variables:
@@ -12,45 +11,29 @@ cache:
     - venv/
 
 jupyter-build-html:
-  stage: build1
-  image: jupyter/scipy-notebook
+  stage: build
+  image: sphinxdoc/sphinx-latexpdf
   script:
     - python3 -V  # Print out python version for debugging
     - pip install virtualenv
-    - virtualenv venv1
-    - source venv1/bin/activate
+    - virtualenv venv
+    - source venv/bin/activate
     - pip install --upgrade pip
     - pip install -r requirements.txt -v
     - alias python=python3  # for jb clean ...
     - jupyter-book clean .
     - jupyter-book build . --builder html
+    - jupyter-book build . --builder pdflatex
   artifacts:
     paths:
       - _build/
 
-jupyter-build-pdf:
-  stage: build2
-  image: sphinxdoc/sphinx-latexpdf
-  script:
-    - python3 -V  # Print out python version for debugging
-    - pip install virtualenv
-    - virtualenv venv2
-    - source venv2/bin/activate
-    - pip install --upgrade pip
-    - pip install -r requirements.txt -v
-    - alias python=python3  # for jb clean ...
-    - jupyter-book clean .
-    - jupyter-book build . --builder pdflatex --path-output _pdfbuild
-  artifacts:
-    paths:
-      - _pdfbuild/
-
 pages:
   stage: deploy
   image: busybox:latest
   script:
     - mv _build/html public
-    - mv _pdfbuild/latex/datascience-skript.pdf public/
+    - mv _build/latex/datascience-skript.pdf public/
   artifacts:
     paths:
       - public