Fully working React app with nodejs as server .
To have nodejs as server in the root folder type:
npm install
npm run dev
On other terminal run reactjs:
Open folder ./react_node_app and run command:
npm install
npm run start
open browser (if it doesn't open automatically) and in an address bar put:
Run localhost:3000/get-campaign - to add campaign
Run localhost:3000/add-campaign - to add campaign