Update npm start script.
Update npm start script.

The start script is what we use to run the app locally. This is useful
for debugging, etc. Our start script just calls Electron on the
entry point script to the app.

REFS: #1

into-cps/intocps-ui,into-cps/intocps-ui,into-cps/intocps-ui,into-cps/intocps-ui,into-cps/intocps-ui