fix(ci): move variant condition in build steps

Author: acostes

.github/workflows/docker-build-push.yml

@@ -52,7 +52,6 @@ jobs:
   build-and-push:
     name: Build and Push
     needs: set-env
-    if: matrix.variant != 'sandbox' || needs.set-env.outputs.environment_name == 'production'
     runs-on: ubuntu-latest
     environment: ${{ matrix.github_env || needs.set-env.outputs.environment_name }}
     strategy:
@@ -97,6 +96,7 @@ jobs:
           echo "VOLONTARIAT_URL=${{ vars.VOLONTARIAT_URL }}" >> $GITHUB_OUTPUT
 
       - name: Build and push ${{ matrix.service }} image
+        if: ${{ matrix.variant != 'sandbox' || needs.set-env.outputs.environment_name == 'production' }}
         uses: docker/build-push-action@v6
         with:
           context: ./${{ matrix.service }}