firebase.json

{
    "firestore": {
      "rules": "firestore.rules",
      "indexes": "firestore.indexes.json"
    },
    "hosting": {
      "source": ".",
      "ignore": [
        "firebase.json",
        "*/.",
        "*/node_modules/*"
      ],
      "frameworksBackend": {
        "region": "us-east1",
        "maxInstances":10
      }
    },
    "storage": {
      "rules": "storage.rules"
    },
    "functions": [
      {
        "source": "functions",
        "codebase": "default",
        "ignore": [
          "node_modules",
          ".git",
          "firebase-debug.log",
          "firebase-debug.*.log"
        ],
        "predeploy": [
          "npm --prefix \"$RESOURCE_DIR\" run build"
        ]
      }
    ],
    "emulators": {
      "auth": {
        "enabled": false,
        "host": "0.0.0.0",
        "port": 9099
      },
      "firestore": {
        "enabled": false,
        "host": "0.0.0.0",
        "port": 8080
      },
      "functions": {
        "enabled": true,
        "host": "0.0.0.0",
        "port": 5001
      },
      "hosting": {
        "enabled": true,
        "host": "0.0.0.0",
        "port": 5000
      },
      "storage": {
        "enabled": false,
        "host": "0.0.0.0",
        "port": 9199
      },
      "ui": {
        "enabled": true,
        "host": "0.0.0.0",
        "port": 4000
      }
    }
}