Visit www.ultralowbandwidth.com or ulb.io
Clone this badboy down, climb in that directory, and get your gems in order with bundle install
Make sure to set the API keys locally (with bash, for the current shell each time you want to (crumby, I know—working on it!)):
export FORECAST_KEY=...
And then run it: shotgun app.rb
, and lisit localhost:9393
(probably) in your browser.
Push to heroku with git as normal, then set:
heroku config:set FORECAST_KEY="...""