Netlify for officialexample

[ndelangen]

Issue: Netlify example was missing for newly added official storybook example

What I did

• Added a netlify site
• Added a if case for the pre-defined environment variable to deploy the right example

[codecov]

Codecov Report

Merging #2532 into release/3.3 will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff              @@
##           release/3.3    #2532   +/-   ##
============================================
  Coverage        20.18%   20.18%           
============================================
  Files              398      398           
  Lines             8838     8838           
  Branches           947      945    -2     
============================================
  Hits              1784     1784           
+ Misses            6312     6310    -2     
- Partials           742      744    +2

Impacted Files	Coverage Δ
app/react/src/server/utils.js	0% <0%> (-53.58%)	⬇️
...modules/ui/components/stories_panel/text_filter.js	30.98% <0%> (ø)	⬆️
lib/ui/src/modules/api/configs/init_api.js	40.42% <0%> (ø)	⬆️
.../src/modules/ui/components/stories_panel/header.js	29.62% <0%> (ø)	⬆️
addons/knobs/src/components/types/Color.js	8.21% <0%> (ø)	⬆️
...ddons/actions/src/containers/ActionLogger/index.js	2.98% <0%> (ø)	⬆️
addons/actions/src/lib/decycle.js	36.61% <0%> (ø)	⬆️
.../ui/src/modules/ui/components/addon_panel/index.js	34.78% <0%> (ø)	⬆️
app/react-native/src/bin/storybook-build.js	0% <0%> (ø)	⬆️
...ddons/actions/src/lib/types/function/isReserved.js	14.28% <0%> (ø)	⬆️
... and 56 more

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[ndelangen]

Works: https://5a3cfb970b79b765073bb74f--storybooks-official.netlify.com/