Update .gitlab-ci.yml file

.gitlab-ci.yml

@@ -181,6 +181,9 @@ deploy_demo:
     - './update_ecolyo_dev.sh'
   only:
     - dev
+  environment:
+    name: ecolyodemo
+    url: https://ecolyo.ecolyodemo.cozy.self-data.alpha.grandlyon.com/
 
 deploy_alpha:
   stage: deploy