add possibility to add a custom empty app

cookiecutter.json

@@ -61,5 +61,7 @@
     "Github"
   ],
   "keep_local_envs_in_vcs": "y",
-  "debug": "n"
+  "debug": "n",
+  "include_custom_app": "n",
+  "custom_app_name": "core",
 }

{{cookiecutter.project_slug}}/config/settings/base.py

@@ -91,6 +91,9 @@ THIRD_PARTY_APPS = [
 
 LOCAL_APPS = [
     "{{ cookiecutter.project_slug }}.users",
+    {%- if cookiecutter.include_custom_app == "y" %}
+    "{{ cookiecutter.custom_app_name }}",
+    {%- endif %}
     # Your stuff: custom apps go here
 ]
 # https://docs.djangoproject.com/en/dev/ref/settings/#installed-apps