notification: add firebase notification to web

core/apps/notifications/models/notification.py

@@ -3,7 +3,15 @@ from django.db import models
 from core.apps.shared.models import BaseModel
 from core.apps.accounts.models import User
 
+
 class Notification(BaseModel):
+    type = models.CharField(
+        choices=[('web', 'web'), ('mobile', 'mobile')],
+        max_length=6,
+        default='mobile'
+    )
     user = models.ForeignKey(User, on_delete=models.CASCADE, related_name='notifications')
     token = models.CharField(max_length=255, unique=True)
-    
+
+    class Meta:
+        unique_together = ('type', 'user', 'token')