Add Webpack publicPath

[dmitrylyzo]

Error on webOS 1.2 (probably any old WebKit browser):

Automatic publicPath is not supported in this browser

The comment beside:

// When supporting browsers where an automatic publicPath is not supported you must specify an output.publicPath manually via configuration
// or pass an empty string ("") and set the __webpack_public_path__ variable from your code to use your own logic.

Changes
Add empty publicPath.

Issues
webOS 1.2 fails.

No need to backport because 10.7 branch has an older webpack.
But no harm.

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!

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1.5% Duplication