Get Google Analytics working

Although GA tracking code is present, it is not logging page views.

One popular react-based method is react-ga:

• https://github.com/react-ga/react-ga
• https://www.npmjs.com/package/react-ga
• https://medium.com/geekculture/how-to-use-google-analytics-on-reactjs-in-5-minutes-7f6b43017ba9