django-tenants added, and configurated customers app

core/apps/shared/models/base.py

@@ -0,0 +1,9 @@
+from django.db import models
+
+
+class BaseModel(models.Model):
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
+
+    class Meta:
+        abstract = True