React without react-scripts

copy from https://github.com/lcmartinezdev/react-basics

yarn install

yarn upgrade

yarn webpack

yarn webpack-dev-server

and visit http://localhost:8080

for Yarn 2.x

yarn set version berry
rm yarn.lock
touch yarn.lock

# and
yarn 
yarn webpack
#etc

all done!

Please see .yarnrc and .yarn/releases/yarn-berry.cjs