outpost: rewrite kubernetes controller

passbook/outposts/migrations/0008_auto_20201014_1547.py

@@ -0,0 +1,26 @@
+# Generated by Django 3.1.2 on 2020-10-14 15:47
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("passbook_outposts", "0007_remove_outpost_channels"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="outpost",
+            name="deployment_type",
+            field=models.TextField(
+                choices=[
+                    ("kubernetes", "Kubernetes"),
+                    ("docker", "Docker"),
+                    ("custom", "Custom"),
+                ],
+                default="custom",
+                help_text="Select between passbook-managed deployment types or a custom deployment.",
+            ),
+        ),
+    ]