Trigger dune-image build on push.

.gitlab-ci.yml

+trigger_dune-image_build:
+  stage: deploy
+  image: curlimages/curl
+  script:
+    - curl --request POST --form "token=$CI_JOB_TOKEN" --form ref=master https://gitlab.cc-asp.fraunhofer.de/api/v4/projects/5912/trigger/pipeline
+  only:
+    - master
+  tags:
+    - asprunner