Add info about using Docker-ized ruby-tensorflow-ubuntu
Add info about using Docker-ized ruby-tensorflow-ubuntu

chrhansen/tensorflow.rb,somaticio/tensorflow.rb,somaticio/tensorflow.rb,chrhansen/tensorflow.rb,chrhansen/tensorflow.rb,somaticio/tensorflow.rb,chrhansen/tensorflow.rb,somaticio/tensorflow.rb,somaticio/tensorflow.rb