Fix env variables and sentry source upload

[mpetrunic]

• add env variable replacement during build
• add sentry plugin for sourcemap upload
• remove type and eslint checking in webpack

@morrigan Can you take a detail look and set required secrets.

resolves #399

[codecov]

Codecov Report

Merging #402 (7004cb1) into master (318f11f) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #402   +/-   ##
=======================================
  Coverage   58.29%   58.29%           
=======================================
  Files          69       69           
  Lines        1091     1091           
  Branches      125      125           
=======================================
  Hits          636      636           
  Misses        431      431           
  Partials       24       24           

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unit	58.29% <ø> (ø)

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[morrigan]

I've already set the secrets because using them in my draft PR so check to align that.

[mpetrunic]

I've already set the secrets because using them in my draft PR so check to align that.

there is only sentry dns from what I saw

[BeroBurny]

better use sigp/lighthouse:latest verzion 1.0.5 could be deprecated in few months

[morrigan]

ha, double edged sword :D
We can let users do "docker pull" if update is needed. To me looks better to be on stable version that's working for us

[BeroBurny]

probably this package will help in maintenance https://www.npmjs.com/package/dotenv-webpack

[morrigan]

Looks good. Added auth secret