[ci] create publish job

.gitlab-ci.yml

+stages:
+    - publish
+
+.node: &node
+ image: node:9.6-alpine
+  tags:
+    - nodejs
+
+pages:
+  <<: *node
+  stage: publish
+  script:
+    - npm install
+    - npm run-script build
+    - mv dist public
+    - ls public
+  artifacts:
+    untracked: true
+    paths:
+      - public
+  allow_failure: true
+  when: manual
+  only:
+    - master
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