Fix mongo uri github actions issue (need to add the secret still but …

…don't have the permissions to do so)

.github/workflows/backend-ci.yml

@@ -50,6 +50,7 @@ jobs:
   test:
     runs-on: ubuntu-latest
     needs: build
+    env: MONGO_URI = ${{ secrets.MONGO_URI }}
     defaults:
       run:
         working-directory: Backend