Set up code ownership (#314)

.github/CODEOWNERS

@@ -0,0 +1,13 @@
+# Please sort into logical groups with comment headers. Sort groups in order of specificity.
+# For example, default owners should always be the first group.
+# Sort lines alphabetically within these groups to avoid accidentally adding duplicates.
+#
+# https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners
+
+# Default file owners
+* @bitwarden/dept-bre
+
+# Platform team for Unified setup
+docker-unified/Dockerfile @bitwarden/team-platform-dev
+docker-unified/docker-compose.yml @bitwarden/team-platform-dev
+docker-unified/entrypoint.sh @bitwarden/team-platform-dev