firebase.json

{
  "firestore": {
    "rules": "firestore.rules",
    "indexes": "firestore.indexes.json"
  },
  "storage": {
    "rules": "firebase.storage.rules"
  },
  "hosting": [
    {
      "target": "public",
      "public": "build",
      "rewrites": [
        {
          "source": "**",
          "destination": "/index.html"
        }
      ]
    },
    {
      "target": "private",
      "public": "build",
      "rewrites": [
        {
          "source": "**",
          "destination": "/index.html"
        }
      ]
    }
  ],
  "functions": {
    "predeploy": [
      "npm --prefix \"$RESOURCE_DIR\" run lint",
      "npm --prefix \"$RESOURCE_DIR\" run compile"
    ],
    "source": "functions"
  },
  "emulators": {
    "hosting": {
      "enabled": false
    },
    "functions": {
      "port": 5001
    },
    "firestore": {
      "port": 8080
    },
    "auth": {
      "port": 9099
    },
    "ui": {
      "enabled": true,
      "port": 4000
    },
    "storage": {
      "port": 9199
    }
  }
}