Associate image with text in a reactjs and firebase website

I am looking to create separate posts on a school blog website, where teachers can add both text and images. Currently, the text is stored in Firestore, and the images are in Storage. To link each image to its respective post, I need a way to associate them.

Currently, you can add text and images in real time, but they are not linked: https://colegio1.netlify.app/admin