Navigate to Publish.
Here you'll find the Publish button.
Is the Publish button inactive? Then you'll probably see some notices ⚠️ you need to solve first:
Solved everything? Simply click on the Publish button to publish your app.
Your app has now been published to the interwebs and is ready to be used by your visitors. All that's left is to embed the app on your website ⬇️ .