To run, open different terminal tabs and run these commands:
Start the angular host at http://localhost:4200/:
npm run start --workspace=angular-host
Start the react host at http://localhost:4201/:
npm run start --workspace=react-host
Start the react microfrontend, using SystemJS, whose entrypoint is at http://localhost:8080/remoteEntry.js:
npm run start --workspace=react-microfrontend