On Rails 3.2应用程序
刚刚部署，我收到此消息而不是我的页面。
如果我尝试打开rails控制台，我会得到这个：
WARNING: Nokogiri was built against LibXML version 2.8.0, but has dynamically loaded 2.7.6
/app/.bundle/gems/ruby/1.9.1/gems/execjs-2.0.1/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 /app/.bundle/gems/ruby/1.9.1/gems/execjs-2.0.1/lib/execjs.rb:5:in `<module:ExecJS>'
from /app/.bundle/gems/ruby/1.9.1/gems/execjs-2.0.1/lib/execjs.rb:4:in `<top (required)>'
from /app/.bundle/gems/ruby/1.9.1/gems/activesupport-3.2.11/lib/active_support/dependencies.rb:251:in `require'
from /app/.bundle/gems/ruby/1.9.1/gems/activesupport-3.2.11/lib/active_support/dependencies.rb:251:in `block in require'
from /app/.bundle/gems/ruby/1.9.1/gems/activesupport-3.2.11/lib/active_support/dependencies.rb:236:in `load_dependency'
from /app/.bundle/gems/ruby/1.9.1/gems/activesupport-3.2.11/lib/active_support/dependencies.rb:251:in `require'
from /app/.bundle/gems/ruby/1.9.1/gems/coffee-script-2.2.0/lib/coffee_script.rb:1:in `<top (required)>'
from /app/.bundle/gems/ruby/1.9.1/gems/activesupport-3.2.11/lib/active_support/dependencies.rb:251:in `require'
from /app/.bundle/gems/ruby/1.9.1/gems/activesupport-3.2.11/lib/active_support/dependencies.rb:251:in `block in require'
from /app/.bundle/gems/ruby/1.9.1/gems/activesupport-3.2.11/lib/active_support/dependencies.rb:236:in `load_dependency'
from /app/.bundle/gems/ruby/1.9.1/gems/activesupport-3.2.11/lib/active_support/dependencies.rb:251:in `require'
from /app/.bundle/gems/ruby/1.9.1/gems/coffee-script-2.2.0/lib/coffee-script.rb:1:in `<top (required)>'
from /usr/ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.7/lib/bundler/runtime.rb:64:in `require'
from /usr/ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.7/lib/bundler/runtime.rb:64:in `block (2 levels) in require'
from /usr/ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.7/lib/bundler/runtime.rb:62:in `each'
from /usr/ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.7/lib/bundler/runtime.rb:62:in `block in require'
from /usr/ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.7/lib/bundler/runtime.rb:51:in `each'
from /usr/ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.7/lib/bundler/runtime.rb:51:in `require'
from /usr/ruby1.9.2/lib/ruby/gems/1.9.1/gems/bundler-1.0.7/lib/bundler.rb:112:in `require'
from /app/config/application.rb:11:in `<top (required)>'
from /app/.bundle/gems/ruby/1.9.1/gems/railties-3.2.11/lib/rails/commands.rb:39:in `require'
from /app/.bundle/gems/ruby/1.9.1/gems/railties-3.2.11/lib/rails/commands.rb:39:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'
任何线索？