add new /sizes endpoint

uncloud_net/migrations/0005_auto_20201220_1837.py

@@ -0,0 +1,18 @@
+# Generated by Django 3.1 on 2020-12-20 18:37
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('uncloud_net', '0004_auto_20201213_1734'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='wireguardvpn',
+            name='wireguard_public_key',
+            field=models.CharField(max_length=48, unique=True),
+        ),
+    ]