# Extra

- [App Specific Requirements](https://enappd.gitbook.io/ionic-taxi-booking-app-starter/extra/app-specific-requirements.md): This page described additional requirement to run this app properly.
- [Add More Features](https://enappd.gitbook.io/ionic-taxi-booking-app-starter/extra/add-more-features.md): Check how you can add more features to this app package
- [FAQs](https://enappd.gitbook.io/ionic-taxi-booking-app-starter/extra/faqs.md)
- [Firebase Setup (Ionic 4 Version)](https://enappd.gitbook.io/ionic-taxi-booking-app-starter/extra/firebase-setup.md): Use Firebase authentication, upload, storage, CRUD functionalities
- [Firebase Functions (Ionic 4 version)](https://enappd.gitbook.io/ionic-taxi-booking-app-starter/extra/firebase-functions.md): How the booking flow works and how the apps are connected with each other directly
- [Overview](https://enappd.gitbook.io/ionic-taxi-booking-app-starter/extra/firebase-functions/overview.md)
- [Firebase Function in Code](https://enappd.gitbook.io/ionic-taxi-booking-app-starter/extra/firebase-functions/firebase-function-in-code.md)
- [How to Deploy Firebase Functions](https://enappd.gitbook.io/ionic-taxi-booking-app-starter/extra/firebase-functions/how-to-deploy-firebase-functions.md)


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