multiple images,stages,background job

 stages:

  - build

  - test

build-websites:

  stage: build

  image: node

  script:

   - npm install

   - npm install -g gatsby-cli

   - gatsby build

  artifacts:

   paths:

    - ./public

test artifact:

 image: alpine

 stage: test

 script:

  - grep -q "Gatsby" ./public/index.html

  - grep "XXXXX" ./public/index.html

test artifact:

 image: alpine

 stage: test

 script:

  - npm install

  - npm insrall -g gatsby-cli

  - gatsby serve & # & is for background job

  - sleep 3

  - curl "http://localhost:9000" | tac | tac | grep -q "Gatsby"