Maintenance Mode for Firebase Hosting

Learn how to create a maintenance mode for Firebase Hosting.

•  First, make sure you have a maintenance.html file created
•  Second, redirect all users to the maintenance.html with a 503 status code

// Filename: firebase.json

{
  "hosting": {
    "public": "build",
    "ignore": [],
    "redirects": [
      {
        "source": "/index.html",
        "destination": "/maintenance.html",
        "type": 307
      }
    ],
    "headers": [
      {
        "source": "/maintenance.html",
        "headers": [ {
          "key": "status",
          "value": "503"
        } ]
      }
    ]
  }
}