error / warnings during deployment

This needs some more attention

(node:27280) DeprecationWarning: Tapable.plugin is deprecated. Use new API on `.hooks` instead

Browserslist: caniuse-lite is outdated. Please run: npx browserslist@latest --update-db

Why you should do it regularly: https://github.com/browserslist/browserslist#browsers-data-updating

also

[webpack-isomorphic-tools/plugin] [error] Module "css ./node_modules/css-loader/dist/cjs.js??ref--9-1!./node_modules/postcss-loader/dist/cjs.js??ref--9-2!./node_modules/sass-loader/dist/cjs.js!./src/app/assets/stylesheets/app.scss" has no source. Maybe Webpack compilation of this module failed. Skipping this asset.
[webpack-isomorphic-tools/plugin] [error] Module "css ./node_modules/css-loader/dist/cjs.js??ref--8-1!./node_modules/postcss-loader/dist/cjs.js??ref--8-2!./node_modules/react-tabs/style/react-tabs.css" has no source. Maybe Webpack compilation of this module failed. Skipping this asset.