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An error occurred while installing nokogiri
(1.8.0), and Bundler cannot continue.
Make sure that `gem install nokogiri -v '1.8.0'
--source 'https://rubygems.org/'` succeeds before
bundling.

gem install nokogiri -- --use-system-libraries --with-xml2-include=/usr/include/libxml2 --with-xml2-lib=/usr/lib/

or

1. bundle config build.nokogiri --use-system-libraries --with-xml2-include=/usr/include/libxml2 --with-xml2-lib=/usr/lib/
2. bundle install