next.js/examples/custom-server-koa/package.json

{
  "name": "custom-server-koa",
  "scripts": {
    "dev": "node server.js",
    "build": "next build",
    "start": "NODE_ENV=production node server.js"
  },
  "dependencies": {
    "koa": "^1.2.4",
    "koa-router": "^5.4.0",
    "next": "^2.0.0-beta"
  }
}