Error: Cannot find module 'socket.io'

[lww]

Hey, I wanted to test your app, but when I do

node app/rtc/server.js

I get this error:

module.js:340
    throw err;
          ^
Error: Cannot find module 'socket.io'
    at Function.Module._resolveFilename (module.js:338:15)
    at Function.Module._load (module.js:280:25)
    at Module.require (module.js:364:17)
    at require (module.js:380:17)
    at Object.<anonymous> (/Users/LWW/practice/webrtc/webrtc-rails/app/rtc/server.js:5:10)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Function.Module.runMain (module.js:497:10)

Any ideas on how to fix that? I'm just a Rails guy, no experience in Node ;-)

Thanks

[xescugc]

Try to run npm install at app/rtc/ to intall the package.json (it's the NodeJs Gemfile), works?