add ci yaml file for gitlab pages

.gitlab-ci.yml

+# GitLab CI Docker Image
+image: node:5.9.1
+
+cache:
+  paths:
+    - node_modules/
+
+stages:
+ - pages
+
+.build:
+  stage: build
+  script:
+    - npm install
+    - npm run build
+  artifacts:
+    paths:
+      - build
+  tags:
+    - docker
+
+.test:
+  stage: test
+  script:
+    - npm install
+    - npm run startServer
+    - npm run test
+  tags:
+    - docker
+
+pages:
+  stage: pages
+  script:
+  - npm install
+  - npm run doc
+  artifacts:
+    paths:
+    - public
+  only:
+  - master
+  tags:
+    - docker