Use var for url

Author: mquinzin

.github/workflows/developer_ci.yml

@@ -12,19 +12,15 @@ env:
   QA_TIMEOUT_PER_TEST: 150
   # The commit of the PR to embed it in the build tag
   RADIOSS_SHA_HEADER: ${{ github.event.pull_request.head.sha }}
-  DOCKER_REGISTRY: ${{ secrets.DOCKER_REGISTRY }}
-  # DOCKER_REGISTRY_USER: ${{ secrets.DOCKER_REGISTRY_USER }}
-  # DOCKER_REGISTRY_PASSWD: ${{ secrets.DOCKER_REGISTRY_PASSWD }}
+
 jobs:
 
   # This job is a guard to avoid running CI if workflows files are changed (even if they are not the only ones)
   guard:
     # runs-on: developer_ci   
     runs-on: ["dev_pmci","fr-shady"]
-    env:
-      DOCKER_REGISTRY: ${{ secrets.DOCKER_REGISTRY }}
     container: 
-      image: "fr-qafactorydev.europe.altair.com/common-linux64"
+      image: "${{ secrets.DOCKER_REGISTRY }}/common-linux64"
       credentials: 
         username: ${{ secrets.DOCKER_REGISTRY_USER }}
         password: ${{ secrets.DOCKER_REGISTRY_PASSWD }}