django-tenants added, and configurated customers app

core/apps/shared/apps.py

@@ -0,0 +1,6 @@
+from django.apps import AppConfig
+
+
+class SharedConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'core.apps.shared'

core/apps/shared/models/__init__.py

@@ -0,0 +1 @@
+from .base import *

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