Refactor Frontend architecture/ update documentation

[b-m-f]

The current architecture is very custom, and might make it more difficult to start working on it.

How exactly the code for each page is built must either be documented (consider splitting the build script into its own module) or could use a community project, such as NuxtJs with a custom webpack configuration to add Elm.

Elm should stay for its superiority to plain JavaScript when working with data.

[b-m-f]

After some thought, the best way to move forward is https://nuxtjs.org/.

This will need the following changes

• create new nuxt application
• update Dockerfile to use a node environment to run nuxt app in production
• port existing Structure into React code