Add .gitlab-ci.yml

.gitlab-ci.yml

+test-success:
+  tags:
+    - qa-runner-1603903254
+  script: echo 'OK'
+
+test-failure:
+  tags:
+    - qa-runner-1603903254
+  script:
+    - echo 'FAILURE'
+    - exit 1
+
+test-tags:
+  tags:
+   - invalid
+  script: echo 'NOOP'
+
+test-artifacts:
+  tags:
+    - qa-runner-1603903254
+  script: mkdir my-artifacts; echo "CONTENTS" > my-artifacts/artifact.txt
+  artifacts:
+    paths:
+    - my-artifacts/