Fix cicd for forked projects

.gitlab-ci.yml

@@ -24,6 +24,8 @@ cache:
     - venv/
 
 before_script:
+  rules:
+    - if: '$CI_PROJECT_NAMESPACE == "https://git.rwth-aachen.de/fst-tuda/public/lehre/"
   - python --version  # For debugging
   - pip install virtualenv
   - virtualenv venv
@@ -32,10 +34,12 @@ before_script:
 
 
 test:
+  rules:
+    - if: '$CI_PROJECT_NAMESPACE == "https://git.rwth-aachen.de/fst-tuda/public/lehre/"
   tags:
-  - env:docker
+    - env:docker
   script:
-    #-  python setup.py test
+  #-  python setup.py test
     - pip install flake8==5.0.4 flake8-nb==0.5.2 # you can also use tox
     - pwd
     - ls -lh
@@ -44,6 +48,8 @@ test:
 
 
 run:
+  rules:
+    - if: '$CI_PROJECT_NAMESPACE == "https://git.rwth-aachen.de/fst-tuda/public/lehre/"
   tags:
   - env:docker
   script: