Is it possible to have the uploaded files (e.g. via wysiwyg content editor) stored in blob? It appears they are stored locally, which is not going to work in a web farm.
you can declare one endpoint at controller and from that controller you can catch your images and use nopCommerce PictureService class method to save and get url of images from your blob storage. although this one is php sample https://www.codexworld.com/ckeditor-upload-image-to-server-using-php/