add ci/cd

.gitlab-ci.yml

+stages:
+    - deploy
+
+deploy-worker:
+    image: node:lts
+    stage: deploy
+    environment: production
+    before_script:
+        # install dependencies
+        - cd kv-tutorial
+        - npm ci
+    script:
+        - npm run deploy
+    rules:
+        # This rule triggers this job after any push to the default branch
+        - if: $CI_COMMIT_REF_NAME == $CI_DEFAULT_BRANCH