The only dependencies are Ruby, Rubygems and bundler.
bundle installSet the BACK_END variable to the destination host and start a rackup application like this:
BACK_END=https://www.husky.io bundle exec rackup app.ru -p 3000Result:
[2023-04-14 14:24:42] INFO WEBrick 1.8.1
[2023-04-14 14:24:42] INFO ruby 3.1.2 (2022-04-12) [arm64-darwin21]
[2023-04-14 14:24:42] INFO WEBrick::HTTPServer#start: pid=73213 port=3000
curl -i localhost:3000