ci: include backend integration tests

backend/backend/.gitlab-ci.yml

@@ -0,0 +1,15 @@
+integration:backend:
+  image: registry.gitlab.com/openstapps/projectmanagement/builder:v18
+  stage: test
+  dependencies:
+    - build
+  variables:
+    DOCKER_DRIVER: overlay2
+  services:
+    - docker:dind
+  script:
+    - docker login -u gitlab-ci-token -p $CI_JOB_TOKEN $CI_REGISTRY
+    - pnpm install --offline
+    - pnpm test:integration
+  tags:
+    - secrecy