brew install ruby
brew install rbenv
rbenv init
echo 'eval "$(rbenv init -)"' >>~/.bash_profile
rbenv install 2.7.0
rbenv global 2.7.0
gem install --user-install bundler jekyll
echo 'export PATH="$HOME/.gem/ruby/2.7.0/bin:$PATH"' >>~/.bash_profile
gem env
bundle install
bundle exec jekyll serve