added to git ignore.

Author: RossBugginsNHS

infrastructure/terraform/.gitignore

@@ -3,6 +3,13 @@
 # Transient backends
 components/**/backend_tfscaffold.tf
 
+# Exclude all .tfvars files, which are likely to contain sensitive data, such as
+# password, private keys, and other secrets. These should not be part of version
+# control as they are data points which are potentially sensitive and subject
+# to change depending on the environment.
+*.tfvars
+*.tfvars.json
+
 # Compiled files
 **/*.tfstate
 **/*.tfplan