firebase.json

{
  "hosting": {
    "public": "dist",
    "ignore": ["firebase.json", "**/.*", "**/node_modules/**"],
    "rewrites": [
      {
        "source": "**",
        "destination": "/index.html"
      }
    ],
    "headers": [
      {
        "source": "/version.json",
        "headers": [
          {
            "key": "Access-Control-Allow-Origin",
            "value": "*"
          },
          {
            "key": "Cache-Control",
            "value": "no-cache, no-store, must-revalidate"
          },
          {
            "key": "Pragma",
            "value": "no-cache"
          },
          {
            "key": "Expires",
            "value": "0"
          }
        ]
      }
    ]
  },
  "functions": [
    {
      "source": "functions",
      "codebase": "default",
      "ignore": ["node_modules", ".git", "firebase-debug.log", "firebase-debug.*.log"],
      "predeploy": ["npm --prefix \"$RESOURCE_DIR\" run lint", "npm --prefix \"$RESOURCE_DIR\" run build"]
    }
  ]
}