In my package.json I have these two scripts:
package.json
\"scripts\": { \"start-watch\": \"nodemon run-babel index.js\", \"wp-server\": \"webpack-
In my case I have two projects, one was UI and the other was API, and both have their own script in their respective package.json files.
So, here is what I did.
npm run --prefix react start& npm run --prefix express start&