add gitlab ci config

# This file is a template, and might need editing before it works on your project.

# Official framework image. Look for the different tagged releases at:

# https://hub.docker.com/r/library/node/tags/

image: node:latest

# Pick zero or more services to be used on all builds.

# Only needed when using a docker container to run your tests in.

# Check out: http://docs.gitlab.com/ce/ci/docker/using_docker_images.html#what-is-a-service

services:

# This folder is cached between builds

# http://docs.gitlab.com/ce/ci/yaml/README.html#cache

cache:

  paths:

  - node_modules/

test_async:

  script:

   - npm install

   - npm test