Entertainment web app w/ Next.js, Tailwind CSS, and Firebase

This is my first submission in which I decided to develop the given prompt as a full-stack application! It was tough, but it was fun. While I learned a lot, I still have much to learn, and I would love feedback.

That being said, I do have some questions:

1. I would also love to try out other platforms of BaaS (Back end as a service). What are other alternative services to Firebase?

2. Learning about permissions through this project has gotten me interested in security-related topics. What are some resources that can help me understand more about security for web applications?

Thank you!