Turn on JS/CSS compression by default

railties/lib/rails/generators/rails/app/templates/Gemfile

@@ -8,6 +8,7 @@ source 'http://rubygems.org'
 <%= "gem 'json'\n" if RUBY_VERSION < "1.9.2" -%>
 gem 'sass', '~> 3.1.0.alpha'
 gem 'coffee-script'
+gem 'uglifier'
 
 # Use unicorn as the web server
 # gem 'unicorn'

railties/lib/rails/generators/rails/app/templates/config/environments/production.rb.tt

@@ -15,6 +15,10 @@
   # (comment out if your front-end server doesn't support this)
   config.action_dispatch.x_sendfile_header = "X-Sendfile" # Use 'X-Accel-Redirect' for nginx
 
+  # Compress both stylesheets and JavaScripts
+  config.assets.js_compressor  = :uglifier
+  config.assets.css_compressor = :scss
+
   # Force all access to the app over SSL, use Strict-Transport-Security, and use secure cookies.
   # config.force_ssl = true