Creating a new project and submit app with Ionic Pro v1

Hello, I created a new project in Ionic version 1. I got a little confused with Ionic Pro.

After build ios, what should we do to submit apps for the first time to the App Store?

Do we need to send the project with Xcode after building it? Or should we use the ionic dashboard completely to send the application for the first time?

Could you please explain step by step?

Thank you.