Best Server for Ionic 2 App

I have followed the ionic blog post about creating a MEAN app and hosting it with heroku. I am able to access the app through the browser and it works fine, however when I test it using Ionic View, the app is not accessing the heroku server, the API calls are not working. Is there a recommended server or process for hosting the server for my app in the cloud? Where are most people hosting the APIs for their apps?