add demo .gitlab-ci.yaml file

.gitlab-ci.yaml

@@ -0,0 +1,16 @@
+stages:
+  - build
+  - test
+
+variables:
+  APP_NAME: "demo-app"
+
+build:
+  stage: build
+  script:
+    - echo "Building $APP_NAME"
+
+test:
+  stage: test
+  script:
+    - echo "Testing $APP_NAME"