Fix formatting with black

.gitlab-ci.yml

@@ -30,8 +30,14 @@ lint:
   stage: test
   script:
     - source $VIRTUAL_ENV/bin/activate
-    - pip install pre-commit
-    - pre-commit run --all-files || (echo "Auto-fixing formatting issues" && black backend/ && git diff && exit 1)
+    - pip install pre-commit black flake8
+    # Run pre-commit hooks
+    - pre-commit run --all-files || (
+        echo "Auto-fixing formatting issues with black..." &&
+        black backend/ &&  # Fix formatting locally
+        git diff &&        # Show fixes in pipeline output
+        exit 1             # Fail the job to indicate changes are needed
+      )
 
 deploy:
   stage: deploy