e2e containers from the CI weren't properly deleting themselves, this fixes that

.gitlab-ci.yml

@@ -198,7 +198,7 @@ e2e:
         - docker logs ws-${CI_COMMIT_SHORT_SHA}_workflow_1
         - docker logs ws-${CI_COMMIT_SHORT_SHA}_web_1
         - docker network prune -f
-        - docker-compose -f docker-compose.ci.yml down
+        - COMPOSE_PROJECT_NAME=ws-${CI_COMMIT_SHORT_SHA} docker-compose -f docker-compose.ci.yml down
         - docker image rm -f base-build:${CI_COMMIT_SHORT_SHA}
         - docker image rm -f e2e:${CI_COMMIT_SHORT_SHA}
     dependencies: []