TLDR
Image uploads in a local development environment are currently defaulted to local psql. In production environment (Heroku), a cloud storage service stores images. Heroku does not host pictures, Heroku's addon cloud service Cloudinary does. It offers a solution to web application’s entire image management pipeline. On the back-end, images uploads to or deleted from Cloudinary. Your rails app displays images hosted on Cloudinary via API exchange. The best part is that Cloudinary will not ask for your credit card to sign up for 10GB free storage.via the TL;DR App
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Written by gerald-goh | A Developer who finds joy in combining the appeal of design with the complexity of engineering.