brew install flyctl && fly launch --from https://github.com/moznion/ruby_docker-images
curl -L https://fly.io/install.sh | sh && fly launch --from https://github.com/moznion/ruby_docker-images
iwr https://fly.io/install.ps1 -useb | iex; fly launch --from https://github.com/moznion/ruby_docker-images