I've found some similar questions, and good link on the topic. Such as this one (Easiest way to store images in database on Heroku?), where the top answer is to re-think using their DB and instead go with S3.
What I need is store 120 100KB images. That's it. There is no dynamic aspect. It's not like I have 10,000 users, and each one needs to store their profile picture. None of that. I just need to store 120 100KB images. The amount of images will never never change, neither growing or shrinking. 3 years from now, the same 120 images will be all that there is.
For these reasons, I want to store these in my DB. S3 is overkill, could cost some, extra time and cost needed implementing that solution, etc. In my DB, it's a measly 12MB which is a fraction of a fraction of the DB's total size.
How can I store the images? What datatype should I use and how can I upload them into my DB?