アプリを実行すると、次のエラーが表示されます。
/usr/lib64/ruby/gems/1.8/gems/execjs-1.4.0/lib/execjs/runtimes.rb:51:in `autodetect': Could not find a JavaScript runtime. See https://github.com/sstephenson/execjs for a list of available runtimes. (ExecJS::RuntimeUnavailable)
from /usr/lib64/ruby/gems/1.8/gems/execjs-1.4.0/lib/execjs.rb:5
from /usr/lib64/ruby/gems/1.8/gems/coffee-script-2.2.0/lib/coffee_script.rb:1:in `require'
from /usr/lib64/ruby/gems/1.8/gems/coffee-script-2.2.0/lib/coffee_script.rb:1
from /usr/lib64/ruby/gems/1.8/gems/coffee-script-2.2.0/lib/coffee-script.rb:1:in `require'
from /usr/lib64/ruby/gems/1.8/gems/coffee-script-2.2.0/lib/coffee-script.rb:1
from /usr/lib64/ruby/gems/1.8/gems/coffee-rails-3.2.2/lib/coffee-rails.rb:1:in `require'
from /usr/lib64/ruby/gems/1.8/gems/coffee-rails-3.2.2/lib/coffee-rails.rb:1
from /usr/lib64/ruby/gems/1.8/gems/bundler-1.3.4/lib/bundler/runtime.rb:72:in `require'