When developing an app for Contentful using the App Framework, you can now host it directly on Contentful without relying on third-party solutions, thanks to the introduction of "app hosting". This new feature allows developers to upload their application in bundles, which simplifies the process of finding a suitable hosting provider and provides various development features. The app bundle should contain an index.html file as the main entry point, along with any necessary assets like CSS and JavaScript files. Contentful offers a quickstart tool, create-contentful-app, to help new developers get started, and also provides a simple three-step process for bundling and hosting apps. While some common errors may occur during the upload process, such as missing index.html or incorrect file structure, these can usually be fixed by checking the developer console for errors and ensuring that all necessary files are uploaded correctly.