[spike] Can our gatsby example & template produce static HTML pages

[philsturgeon]

Currently we have "hacked" Gatsby by example by embedding SPA on a single page generated by Gatsby.

But Gatsby is a static site generator, so - in principle - we should be generating a single page of (mostly) static HTML per each operation/article/etc.

Research if there is a way to use current codebase to achieve such result.

For example we could use uriMap to generate pages and StaticRouter to generate HTML for each of those pages.

End result of the spike should be a POC of generating pages in Gatsby or a description why the attempt failed / what are we lacking to generate pages in Gatsby.