Bugfix/hot reload

[Amaru333]

• Fixed hot reload issue.
• npm run dev now uses hot reload.
• React app runs in port 8080 (http://localhost:8080) while the nodejs server runs in port 7080.
• Added a proxy to redirect all the API calls to port 7080 in the dev webpack

[Woozl]

This is a great fix and a huge improvement, thanks for handling this

[Woozl]

The only thing I noticed was the localhost:7080 port still responds with the non-reloading version, since the server.js also points to the app:

qgraph/server.js

Lines 32 to 36 in 14db2d9

	// Send every request to the React app
	// Define any API routes before this runs
	app.get('*', (req, res) => {
	res.sendFile(path.join(__dirname, 'pack', 'index.html'));
	});

Can we put a brief note in the README saying to use localhost:8080? @Amaru333