No, I mean doesn’t it only look for updates of the current tag? That works fine if you set every container to the “latest” tag, but if you set your containers to specific version tags then you won’t get a notification unless that specific tag gets updated.
The professor that taught my algorithms & data structures course said if we were going to keep one book it should be the one for that course. I followed that advice and it’s the one textbook I still have. It’s been 8 years since graduation and I haven’t opened it once. I tend to just read Wikipedia if I need to understand a particular algorithm or data structure.