different environments and variables, run only for specifc branches using only

like staging, production, added different environments below.

And can refer values using variables.

We can use only keyword to specify branch name

 stages:

  - build

  - test

#global cache for all jobs

#cache:

#  key: ${CI_COMMIT_REF_SLUG}

#  paths:

#   - node_modules/

variables:

 STAGING_DOMAIN: instazone-staging.surge.sh

 PRODUCTION_DOMAIN: instazone-production.surge.sh

build-websites:

  stage: build

  image: node

  cache:

   key: ${CI_COMMIT_REF_SLUG}

   paths:

    - node_modules/

  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"

deploy staging:

 stage: deploy staging

 environment:

  name: staging

  url: http://$STAGING_DOMAIN

 only:

  - master

 script:

  - npm install --global surge

  - surge --project ./public --domain $STAGING_DOMAIN

deploy production:

 stage: deploy production

 environment:

  name: production

  url: http://$STAGING_PRODUCTION

 when: manual

 allow_failure: false #this will block remaining steps to execute till this manual stage is ran

 script:

  - npm install --global surge

  - surge --project ./public --domain $STAGING_PRODUCTION