Uses Firebase 9 and React 18.

[dvdpena]

Firebase changed a lot in version 9, and the original tutorial uses ]Firebase 7. To use the exact same sintaxis, it's necessary to import the compat version when using Firebase 9.

To avoid this, I made the changes necessary to the sintaxis to allow the modularity in the firebase library.

If this version could be added, alongside the original, I think it would help people following the tutorial in 2022+

[yosuanicolaus]

Thank you very much for your work!

[pikapower9080]

Thank you, your code helped me migrate my fork of the app, you're the best!