webpack serve - Githubissues

Without this change we get this error:
npm start

> webar.rocks.face_demos@1.0.0 start /Users/julestestard/go/src/github.com/piepacker/WebAR.rocks.face/reactThreeFiberDemos
> cross-env NODE_ENV=development webpack-dev-server --host 0.0.0.0 --config config/webpack.dev.js

internal/modules/cjs/loader.js:818
  throw err;
  ^

Error: Cannot find module 'webpack-cli/bin/config-yargs'
Require stack:
- /Users/julestestard/go/src/github.com/piepacker/WebAR.rocks.face/reactThreeFiberDemos/node_modules/webpack-dev-server/bin/webpack-dev-server.js
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:815:15)
    at Function.Module._load (internal/modules/cjs/loader.js:667:27)
    at Module.require (internal/modules/cjs/loader.js:887:19)
    at require (internal/modules/cjs/helpers.js:74:18)
    at Object.<anonymous> (/Users/julestestard/go/src/github.com/piepacker/WebAR.rocks.face/reactThreeFiberDemos/node_modules/webpack-dev-server/bin/webpack-dev-server.js:65:1)
    at Module._compile (internal/modules/cjs/loader.js:999:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1027:10)
    at Module.load (internal/modules/cjs/loader.js:863:32)
    at Function.Module._load (internal/modules/cjs/loader.js:708:14)
    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:60:12) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [
    '/Users/julestestard/go/src/github.com/piepacker/WebAR.rocks.face/reactThreeFiberDemos/node_modules/webpack-dev-server/bin/webpack-dev-server.js'
  ]
}
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! webar.rocks.face_demos@1.0.0 start: `cross-env NODE_ENV=development webpack-dev-server --host 0.0.0.0 --config config/webpack.dev.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the webar.rocks.face_demos@1.0.0 start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/julestestard/.npm/_logs/2021-03-10T07_52_35_848Z-debug.log
WebAR-rocks / WebAR.rocks.face

webpack serve #16
