Separate netlify instances

[cheapsteak]

This is for having separate netlify instances for docs + each example

https://deploy-preview-2340--storybooks.netlify.com/
https://deploy-preview-2340--storybooks-cra.netlify.com/
https://deploy-preview-2340--storybooks-vue.netlify.com/

Once merged, we should be able to link to

https://storybooks.netlify.com/
https://storybooks-cra.netlify.com/
https://storybooks-vue.netlify.com/

Note:

1. Seems sometimes builds aren't deterministic. This build failed due to "Cannot find module 'webpack'", but a rebuild (with no code changes) was successful
2. The Github PR integration seems to only show the most recently added Netlify instance (Vue)

[codecov]

Codecov Report

Merging #2340 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2340   +/-   ##
=======================================
  Coverage   21.19%   21.19%           
=======================================
  Files         283      283           
  Lines        6156     6156           
  Branches      730      730           
=======================================
  Hits         1305     1305           
  Misses       4302     4302           
  Partials      549      549

Impacted Files	Coverage Δ
app/react/src/server/config/babel.js	0% <0%> (-100%)	⬇️
app/react/src/server/babel_config.js	0% <0%> (-77.42%)	⬇️
app/vue/src/server/babel_config.js	77.41% <0%> (+77.41%)	⬆️
app/vue/src/server/config/babel.js	100% <0%> (+100%)	⬆️

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