A small example of having Rack run Resque and a small Sintra app. Little else.
Basically borrowed from https://github.com/trineo/resque-example and watered it down even further.
(Largely for my own purposes.)
brew install redis
Have RVM or rbenv setup already, and let them do any setup they need, as driven by .ruby-version and .ruby-gemset. Then:
gem install bundler
bundle install
cp .env.example .env
And edit as appropriate...and have dotenv do it's thing.
redis-server
Use foreman to fire up Rack->Sinatra, and Resque (see Procfile)
foreman start