I am working on a simple project where user can upload their images and share and download anytime, it is clould like service. i am creating this for a learning purpose.

I used mongoDB atlas for storing and retreving images, i want to optimize my approach.

i google it and found image CDN is the way but i am little bit confused that can we use image CDN for such purpose when we need to fetch images for database and upload in it.

please clarify if my knowledge lacks and give me sugeestion for my problem.