How to build an API which manages file upload using node.js express

I am building an app, and i wanted to implement an API which manages the upload of images instantaneously on my app page(see picture below).
No misunderstanding, i don't want an API which permits, upload, from the user's phone to the app, but one which automatically upload sets of photos on one page when needed, taking those pictures from a database.If possible, i wanted to implement filters for those pictures too.I use node.js
If you suggest a better way to do that or can help me out, please do!?

thanks in advance

this is what i want one of my app page to look like

via momo donatien