Add CODEOWNERS File to Template Repo and The Project Template

.github/CODEOWNERS

@@ -0,0 +1,3 @@
+# https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners
+
+* @ONSdigital/ons-python-template

copier.yml

@@ -54,6 +54,11 @@ repository_owner:
   help: "What is your repository owner? (e.g. your GitHub username)"
   default: "ONSdigital"
 
+code_owner:
+  type: str
+  help: "What is your CODEOWNERS default? (e.g. @org/team or @username)"
+  default: "@{{ repository_owner }}"
+
 repository_visibility:
   type: str
   help: "What is your repository visibility?"

project_template/.github/CODEOWNERS.jinja

@@ -0,0 +1,3 @@
+# https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners
+
+* {{ code_owner }}