Configurando url do django-admin para a raiz

src/backend/core/admin.py

 from django.contrib import admin
 
-# Register your models here.
+from .models import Cliente
+
+admin.site.register(Cliente)

src/backend/core/migrations/0001_initial.py

+# Generated by Django 2.0.1 on 2018-01-15 17:32
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Cliente',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('domain_name', models.CharField(max_length=50)),
+            ],
+            options={
+                'verbose_name': 'Cliente',
+                'verbose_name_plural': 'Clientes',
+            },
+        ),
+    ]

src/backend/core/models.py

 from django.db import models
 
 # Create your models here.
+
+class Cliente(models.Model):
+    """Model definition for Cliente."""
+
+    domain_name = models.CharField(max_length=50)
+
+    class Meta:
+        """Meta definition for Cliente."""
+
+        verbose_name = 'Cliente'
+        verbose_name_plural = 'Clientes'
+
+    def __str__(self):
+        """String representation of Cliente."""
+        return self.domain_name

src/backend/urls.py

@@ -17,5 +17,5 @@ from django.contrib import admin
 from django.urls import path
 
 urlpatterns = [
-    path('admin/', admin.site.urls),
+    path('', admin.site.urls),
 ]