https://github.com/ryanb/railscasts/wiki/Server-Setup
From http://www.trottercashion.com/2010/04/21/logrotate-for-rails.html
Create /etc/logrotate.d/our_app
/srv/our_app/current/log/*.log {
daily # rotate daily
rotate 12 # keep twelve copies
compress # gzip the old files
missingok # don't barf if there is no log
copytruncate
}