https://www.npmjs.com/package/http-proxy-middleware
- npm install
- put DSN key in server.js
- npm start
- visit http://localhost:3000/api/foo/bar in your browser and the proxy will redirect you to http://www.example.org/api/foo/bar, as that's what's specified in server.js
- Check your Express log for any sentry sdk activity (transactions). Check Sentry.io to see if you received a transaction event.