For webpack 5 https://github.com/dxw/project-wisdom/commit/f236446af003eb31c281b048fd66400099273c69 This has been replaced with `--mode production` (see https://github.com/webpack/webpack-cli/issues/1934).
For webpack 5
dxw/project-wisdom@f236446
This has been replaced with
--mode production(see webpack/webpack-cli#1934).