create .env with the following code (update credentials). Make sure to create .env in the root directory of the project. nodeapi/.env
APP_NAME=nodeapi
MONGO_URI=mongodb://localhost:27017/nodeapi
PORT=8080
JWT_SECRET=xxxxxx
CLIENT_URL=http://localhost:3000
REACT_APP_GOOGLE_CLIENT_ID=xxxxxx.apps.googleusercontent.com
cd nodeapi
npm install
npm start