Update codeowners

.github/CODEOWNERS

@@ -1,7 +1,20 @@
 # This file is sensitive since rules below may be used for restricting who can
 # make access control changes.
 /.github/CODEOWNERS @GSA-TTS/FAC-admins
-/.github/workflows/fac-restore-util.yml @GSA-TTS/FAC-admins @asteel-gsa
+
+# Changes to the following CI/CD directories will impact operational systems. Any PR involving these files should
+# get a review from someone in FAC-admins
+/.github/workflows/ @GSA-TTS/FAC-admins
+/backend/manifests/ @GSA-TTS/FAC-admins
 
 # Changes to the following Terraform directory will impact access control in cloud.gov spaces. Any PR involving these files should get a review from someone in FAC-admins.
 /terraform/meta/ @GSA-TTS/FAC-admins
+
+# Changes to the following Terraform directories will impact operational systems. Any PR involving these files
+# should get a review from someone in FAC-Admins
+/terraform/dev/ @GSA-TTS/FAC-admins
+/terraform/staging/ @GSA-TTS/FAC-admins
+/terraform/preview/ @GSA-TTS/FAC-admins
+/terraform/production/ @GSA-TTS/FAC-admins
+/terraform/sandbox/ @GSA-TTS/FAC-admins
+/terraform/modules/ @GSA-TTS/FAC-admins