Need help in publish my iOS app to the app store

Could somebody tell me how can I publish my app to the app store? I have an account on developers.apple.com, but its my first app and I don't know how to do this... The app was developed in Apache Cordova, but it makes an *.app file, how can I make an *.ipa file? So I need to make *.ipa and publish it, but I don't know how to do this...