Bring .jsx back

[igor-dv]

Issue: There was a few

What I did

Allow jsx out of the box

[codecov]

Codecov Report

Merging #4024 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #4024   +/-   ##
=======================================
  Coverage   40.75%   40.75%           
=======================================
  Files         444      444           
  Lines        5565     5565           
  Branches      750      750           
=======================================
  Hits         2268     2268           
  Misses       2919     2919           
  Partials      378      378

Impacted Files	Coverage Δ
lib/core/src/server/config/webpack.config.prod.js	0% <ø> (ø)	⬆️
lib/core/src/server/config/webpack.config.js	0% <ø> (ø)	⬆️

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