storage.rules

rules_version = '2';
service firebase.storage {
  match /b/{bucket}/o {
    
    // Default-deny policy for entire storage registry
    match /{allPaths=**} {
      allow read, write: if false;
    }

    // Rules for the product-images folder: public read allowed, authenticated writes only
    match /product-images/{imageId} {
      allow read: if true;
      allow write: if request.auth != null 
                   && request.resource.size < 5 * 1024 * 1024 // limit size to 5MB
                   && request.resource.contentType.matches('image/.*'); // strictly image MIME types
      allow delete: if request.auth != null;
    }
  }
}