Update .gitlab-ci.yml, added section for master

.gitlab-ci.yml

@@ -10,3 +10,15 @@ pages-devel:
   only: 
     - testing
     - test_logoutbutton
+    
+pages-devel:    
+  stage: deploy
+  script:
+    - npm install
+    - "pm2 delete --silent account || :"
+    - pm2 start ./app.js --name=account
+    - pm2 save
+  tags: 
+    - production
+  only: 
+    - master
\ No newline at end of file