Rakefile
require "bundler/gem_tasks"
require "rspec/core/rake_task"
RSpec::Core::RakeTask.new
task :default => :spec
task :test => :spec
current_directory = File.expand_path(File.dirname(__FILE__))
desc "run specs inside docker"
task :docker_spec do
system("docker build -t invoker-ruby . ")
puts "********** Building image is done **********"
system("docker run --name invoker-rspec --rm -v #{current_directory}:/invoker:z -t invoker-ruby")
end