brew install flyctl && fly launch --from https://github.com/abh/plack-middleware-xforwardedfor
curl -L https://fly.io/install.sh | sh && fly launch --from https://github.com/abh/plack-middleware-xforwardedfor
iwr https://fly.io/install.ps1 -useb | iex; fly launch --from https://github.com/abh/plack-middleware-xforwardedfor