Update .gitlab-ci.yml

changed variable to type file, requires changes to pieline

.gitlab-ci.yml

 pages-testing:    
   stage: deploy
   script:
-    - echo $configfiledev > ./config/config.js
+    - cat $configfiledev > ./config/config.js
     - npm install
     - "pm2 delete --silent project || :"
     - pm2 start ./app.js --name=project