firebase.json

{
  "hosting": {
    "rewrites": [
      {
        "source": "**",
        "destination": "/index.html"
      }
    ],
    "headers": [
      {
        "source": "**",
        "headers": [
          {
            "key": "Cache-Control",
            "value": "public, max-age=3600, no-cache"
          },
          {
            "key": "Access-Control-Max-Age",
            "value": "600"
          }
        ]
      },
      {
        "source": "/sw.js",
        "headers": [
          {
            "key": "Cache-Control",
            "value": "private, no-cache"
          }
        ]
      },
      {
        "source": "**/*.chunk.*.js",
        "headers": [
          {
            "key": "Cache-Control",
            "value": "public, max-age=31536000"
          }
        ]
      },
      {
        "source": "/",
        "headers": [
          {
            "key": "Link",
            "value": "</bundle.e659c.js>; rel=preload; as=script, </style.3fc48.css>; rel=preload; as=style"
          }
        ]
      }
    ],
    "public": "build"
  },
  "functions": {
    "source": "functions"
  },
  "firestore": {
    "rules": "firestore.rules",
    "indexes": "firestore.indexes.json"
  }
}