convert webpack config to prod and dev

[zoltanbedi]

Raw numbers from network tab:

Site name	Transfered data	Resources size	Page load finish	DOMContentLoaded	Requests
https://sn-app-dev.netlify.com/login	12.7 MB	57.3 MB	1.1 min	57.56 s	18
https://5e124719629c8f3c3842fe9f--sn-app-dev.netlify.com/login	4.3 MB	8.1 MB	2.18 s	909 ms	16

Lighthouse test:

https://sn-app-dev.netlify.com/login

• fails in that test because it can not load up in time when clear storage is checked
• test result with clear storage unchecked - performance 93
  sn-app-dev.netlify.com-20200106T134956.html.zip

https://5e124719629c8f3c3842fe9f--sn-app-dev.netlify.com/login

• with clear storage checked - performance 70
  5e124719629c8f3c3842fe9f--sn-app-dev.netlify.com-with-clear-storage.html.zip
• without clear - performance 100
  5e124719629c8f3c3842fe9f--sn-app-dev.netlify.com-without-clear.html.zip

Wired in relative ci to follow bundle size. Our project https://app.relative-ci.com/projects/SpRCK0ViJsBVzSUtpFtk

• change the netlify site Publish directory to apps/sensenet/build when merged

[sensenet]

Site name	Url	Last deploy
sn-app-dev	https://5e159291e5f96b07c42b72b1--sn-app-dev.netlify.com	Wed Jan 08 2020 - 08:28:03 GMT+0000 (Coordinated Universal Time)
sn-react-component-docs-dev	https://5e15924eba14c71df227cfd8--sn-react-component-docs-dev.netlify.com	Wed Jan 08 2020 - 08:26:55 GMT+0000 (Coordinated Universal Time)
sn-dms-demo-dev	https://5e15924ee7054f6ff5c5b926--sn-dms-demo-dev.netlify.com	Wed Jan 08 2020 - 08:26:54 GMT+0000 (Coordinated Universal Time)

[codecov]

Codecov Report

Merging #532 into develop will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop     #532   +/-   ##
========================================
  Coverage    91.16%   91.16%           
========================================
  Files          191      191           
  Lines         5208     5208           
  Branches      1292     1292           
========================================
  Hits          4748     4748           
  Misses         460      460

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