* fix: imgur to s3 for englsh guide without conflict
(cherry picked from commit 9c9f15abf4e755feab79ef7090dacdcf497ea7b6)
* fix: revert unrelated changes
* Add this as a guide for Firebase Auth.
This is a thorough guide on how to implement Google sign-in using firebase authentication.
* made folder name lowercase
* updated directory name and frontmatter title