Uploading a photo

Hi all, I have a form for adding a property. There is a table in Supabase with all the data for the object. The main key is on the object ID, which is driven by the administrator when adding an object. First the photos are added, then the object data. Initially, the photos in Supabase table are downloaded from URL, but further loading will be from computer. Could you please tell me how to do it?