now.json

{
  "build": {
    "env": {
      "GITHUB_TOKEN": "@github-token"
    }
  },
  "env": {
    "GITHUB_TOKEN": "@github-token"
  },
  "routes": [
    {
      "src": "/api/.*",
      "methods": ["GET", "OPTIONS"],
      "headers": {
        "Access-Control-Allow-Origin": "*",
        "Access-Control-Allow-Headers": "Origin, X-Requested-With, Content-Type, Accept"
      },
      "continue": true
    },
    {
      "src": "/api/([^/]+)",
      "dest": "/$1.js"
    }
  ]
}