An error occurred while installing nokogiri (1.8.2)
An error occurred while installing nokogiri (1.8.2), and Bundler cannot continue. Make sure that `gem install nokogiri -v '1.8.2' --source 'https://rubygems.org/'` succeeds before bundling. gem install nokogiri -v '1.8.2' -- --use-systemlibraries --with-xml2-config="$(which xml2-config)"