Add migration file

backend/app/migrations/0007_environment.py

@@ -0,0 +1,42 @@
+# Generated by Django 4.1.5 on 2023-10-29 21:24
+
+from django.db import migrations, models
+import django.db.models.deletion
+import uuid
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("app", "0006_alter_project_api_key"),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name="Environment",
+            fields=[
+                (
+                    "id",
+                    models.BigAutoField(
+                        auto_created=True,
+                        primary_key=True,
+                        serialize=False,
+                        verbose_name="ID",
+                    ),
+                ),
+                ("name", models.CharField(max_length=100)),
+                ("identifier", models.CharField(default=uuid.uuid4, max_length=255)),
+                ("is_default", models.BooleanField(default=False)),
+                (
+                    "project",
+                    models.ForeignKey(
+                        on_delete=django.db.models.deletion.CASCADE,
+                        related_name="environments",
+                        to="app.project",
+                    ),
+                ),
+            ],
+            options={
+                "unique_together": {("identifier", "project")},
+            },
+        ),
+    ]