How do you do image uploads and processing?

Simple use case example: edit profile page - profile photo upload. User can upload huge photos from iPhone 7 10MB+, user wants to crop/resize image and may be do something else.

1. Client-side or server-side?
2. What packages, libraries, frameworks are you using?
3. How do you store and serve images on back-end?
4. What type of image processing functions (crop/rotate/face detection/...) are you using?
5. Would you like to see a small article on how to implement such functionality in your own app?