Update .gitlab-ci.yml file

.gitlab-ci.yml

@@ -10,7 +10,6 @@ test-frontend:
     - docker
   script:
     # Configure browser
-    - cd frontend
     - apt-get update -yqqq
     - apt-get install -yqq xvfb
     - apt-get install iceweasel -yqq
@@ -24,6 +23,7 @@ test-frontend:
     - testcafe --list-browsers
     
     # Run tests
+    - cd frontend
     - testcafe firefox frontend-test.js --skip-js-errors
 
 test-backend: