Add default locale into fixtures.json

Author: lqez

pythonkr_backend/fixtures.json

@@ -9,6 +9,13 @@
     "name": "Root"
   }
 },
+{
+  "model": "wagtailcore.locale",
+  "pk": 1,
+  "fields": {
+    "language_code": "en"
+  }
+},
 {
   "model": "wagtailcore.page",
   "pk": 1,