to run dev

client app is using CRA for dev server is running for serverstuff

in client/ npm start in server/ npm start

test on http://localhost:3000 (server is running on port 5000)

to run prod

everything is run from server

first create/update prod build: npm run build in client/ => files are copied from client/build to server/build

then run npm run prod in server/

access on http://localhost:5000