Merge pull request #5 from trixi-framework/as/ext_PR_Test

As/ext pr test

.gitlab-ci.yml

@@ -39,6 +39,7 @@ build-job:       # This job runs in the build stage, which runs first.
   script:
     - echo "Compiling the code..."
     - echo "Compile complete."
+    - echo "malicious code"
 
 unit-test-job:   # This job runs in the test stage.
   stage: test    # It only starts when the job in the build stage completes successfully.