language: ruby
rvm:
  - 2.2.5

install: gem install jekyll html-proofer
script: jekyll build && htmlproofer ./_site

branches:
  only:
  - gh-pages

env:
  global:
  - NOKOGIRI_USE_SYSTEM_LIBRARIES=true # speeds up installation of html-proofer

sudo: false

notifications:
  email:
    on_success: never
    on_failure: change

Add Travis CI configuration file
Add Travis CI configuration file
