i'm following along with michael hartl's tutorial
(http://ruby.railstutorial.org/chapters/a-demo-app#top), creating a demo
i pushed my app/db/data on to heroku (falling-sky-4350.heroku.com/), but
am getting an error
An error occurred in the application and your page could not be served.
Please try again in a few moments.
If you are the application owner, check your logs for details.
my heroku log is attached. can someone please help me to suss it out?