simple newspaper app

This is my first web app I have ever created when I was learning backend web development , I loved the projects , it was fun , I learned a bunch of things from it and it is basically a simple newspaper app to Create , Remove , Update and Delete articles and list them on the page with permissions , authentication system as well as email validation and password reset , I focused on the backend functionalities , so the frontend design is so simple . I already hosted this web app on heroku free tier , feel free to take a look .