vercel.json

{
  "version": 2,
  "builds": [{
    "src": "build/public/**",
    "use": "@now/static"
  }, {
    "src": "build/server.js",
    "use": "@now/node-server"
  }],
  "routes": [{
    "src": "/assets.json",
    "dest": "build/assets.json"
  }, {
    "src": "/favicon.ico",
    "dest": "build/public/favicon.ico"
  }, {
    "src": "/robots.txt",
    "dest": "build/public/robots.txt"
  }, {
    "src": "/site.webmanifest",
    "dest": "build/public/site.webmanifest"
  }, {
    "src": "/service-worker.js",
    "dest": "build/public/service-worker.js"
  }, {
    "src": "/workbox-(?<hash>.*).js",
    "dest": "build/public/workbox-$hash.js"
  }, {
    "src": "/(?<img>.*).png",
    "dest": "build/public/$img.png"
  }, {
    "src": "/static/(.*)",
    "dest": "build/public/static/$1"
  }, {
    "src": "/(.*)",
    "dest": "build/server.js"
  }],
  "env": {
    "NODE_ENV": "production"
  }
}