netlify-faunadb-example2/src/setupProxy.js

const proxy = require('http-proxy-middleware')

module.exports = function(app) {
  app.use(
    proxy('/.netlify/functions/', {
      target: 'http://localhost:9000/',
      pathRewrite: {
        '^/\\.netlify/functions': ''
      }
    })
  )
}