add a backend into my existed small project

Add backend to my project, my current frontend is almost finished using react.js(just need some changes in order to connect to the backend. The backend should use Node.JS with [login to view URL], and use mongoDB to store data(here we use mlab as the mongoDB server [login to view URL]) I already have some dada, after project is finished, we can add new data, or edit/delete existed data. For the frontend, with npm start, you can see the whole finished framework. So frontend should be changed a little bit to connect backend.