I'm new to Phonegap so I installed the Phonegap desktop app, created a project etc.
This all works fine with realtime updates on a device.
Now I want to include Reactjs with es2015 babel using webpack as I would normally do,
but I have no idea how to merge these into the starter project that I created with Phonegap desktop app.
You would just build as you normally would and put your generated (bundle.js) file in the root level www directory and reference it in your index.html.
You could also try to use a template to get started. Something like phonegap-template-react-hot-loader