go to portal folder: cd portal
install npm: sudo npm install
install the amplify: sudo npm install -g @aws-amplify/cli
pull the amplify resources: sudo amplify pull --appId d31fb2nmmf999b --envName dev
install the AWS libraries: sudo npm install aws-amplify @aws-amplify/ui-react
install the graphql: sudo amplify update codegen then sudo amplify codegen
run: npm start.