Image thumbnail service
Your task
Design a simple image-thumbnail service for a small blog platform. Users upload an original photo (up to ~5 MB) and the site needs a 200x200 thumbnail to show in post lists. Traffic is modest: a few hundred uploads a day, reads dominated by visitors loading post pages. Walk through the components, where you store the images, and how thumbnails get generated.
It covers
- Thumbnails
- Object storage
- Async processing