Auto deploy and alias your node_js app to production domain with travis-ci.com and now.sh, but only build/test master and PRs.

.travis.yml

language: node_js
node_js:
  - node
dist: trusty
branches:
  only:
    - master
cache:
  directories:
    - $HOME/.npm
script: npm test
before_deploy: npm install now --no-save
deploy:
  - provider: script
    script: now --token $NOW_TOKEN --public && now alias --token $NOW_TOKEN
    skip_cleanup: true
    on:
      master: true