After you've registered and logged in using your GitHub account, you should now see the welcome screen, where you will find a button to select an application for packaging.
Click on the ADD NEW button to start adding a new application:
The repositories that we can access will be listed, and you can now select one of them to package by clicking on the corresponding ADD button:
You will then be redirected to the page where you can configure your application for packaging, as well as launch new builds, which is the subject of the next chapter.