https://www.youtube.com/watch?v=JJFhOGDvQw8&list=PLnZgHKyxHOEDtwU2gdk3v2Qxt6_cU7q4-

https://www.youtube.com/watch?v=R500Rdfsg00&list=PLnZgHKyxHOECKS3EcBTx8BoJ0SBBfWT4I

https://www.youtube.com/watch?v=6a4B7ev3vd0

//install cors using terminal/command  
        $ npm install cors

//If your using express in your node server just add
        var cors = require('cors');
        app.use(cors())

//Node.js, express.js [route call here]
        app.use('/api/workouts', workoutRouters)

https://stackoverflow.com/questions/41497674/access-control-allow-origin-issue-when-api-call-made-from-react-isomorphic-ap

.