ci: add triggering of acctest

.gitlab-ci.yml

@@ -1,5 +1,6 @@
 stages:
   - build
+  - acctest
 
 variables:
   DOCKER_HOST: tcp://docker:2375/
@@ -13,3 +14,13 @@ build:
   script:
     - build
     - push
+
+acceptance-test:
+  stage: acctest
+  when: on_success
+  variables:
+    AUTH0MOCK_COMMIT: ${CI_COMMIT_SHA}
+    TRIGGERED_BY: registry.gitlab.com/unboundsoftware/shiny/auth0mock
+  trigger: unboundsoftware/shiny/acctest
+# strategy seems to be a premium feature :(
+#  strategy: depend