Fix admin site - Custom admin URL (#5766)

* Update config template file

* Add entry to docs

* Add INVENTREE_ADMIN_ENABLED to settings.py

* Add helper functions for improving admin links

* Refactor existing admin links

* remove debug statements

* Fix custom admin URL

* Expand documentation

* Fix URL

* Improve wording in config_template.yaml

* Extend admin_url tag

- Allow lookup without pk
- Handle case where pk not found

InvenTree/config_template.yaml

@@ -58,6 +58,14 @@ database:
 # Use the environment variable INVENTREE_DEBUG
 debug: True
 
+# Set to False to disable the admin interface (default = True)
+# Or, use the environment variable INVENTREE_ADMIN_ENABLED
+#admin_enabled: True
+
+# Set the admin URL (default is 'admin')
+# Or, use the environment variable INVENTREE_ADMIN_URL
+#admin_url: 'admin'
+
 # Set enabled frontends
 # Use the environment variable INVENTREE_CLASSIC_FRONTEND
 # classic_frontend: True