Refactor firebaseConfig declaration in index.html

Update HTML structure and Firebase configuration

Re-add login section to index.html

Refactor HTML structure and styles for login page

Update index.html

Fix missing newline at end of index.html

Remove login and sign up section

Refactor HTML structure and style for clarity

Update index.html

Update index.html

Add login and signup functionality with Firebase

Implement Firebase signup and login functions

Update index.html

Implement signup and login functions in HTML

Update index.html