Create CODEOWNERS (#26)

.github/CODEOWNERS

@@ -0,0 +1,11 @@
+# This is a template `CODEOWNERS` file for ops charms
+# This file is managed by bootstack-charms-spec and should not be modified
+# within individual charm repos. https://launchpad.net/bootstack-charms-spec
+
+# For more information about CODEOWNER, please refer to
+# https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners#example-of-a-codeowners-file
+
+# These owners will be the default owners for everything in the repo. Unless a
+# later match takes precedence, @canonical/bootstack will be requested for
+# review when someone opens a pull request.
+*       @canonical/soleng-reviewers