SS-1176 adding new migration file

apps/migrations/0018_customappinstance_default_url_subpath.py

@@ -0,0 +1,23 @@
+# Generated by Django 5.1.1 on 2024-11-19 13:27
+
+import apps.models.app_types.custom.custom
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("apps", "0017_alter_streamlitinstance_port"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="customappinstance",
+            name="default_url_subpath",
+            field=models.CharField(
+                blank=True,
+                default="",
+                max_length=255,
+                validators=[apps.models.app_types.custom.custom.validate_default_url_subpath],
+            ),
+        ),
+    ]