create an sns topic for cloudwatch app insghts (#1008)

terraform/account/region/sns_topics.tf

@@ -23,3 +23,24 @@ resource "aws_sns_topic" "ecs_autoscaling_alarms" {
   sqs_success_feedback_sample_rate         = 100
   provider                                 = aws.region
 }
+
+resource "aws_sns_topic" "cloudwatch_application_insights" {
+  name                                     = "cloudwatch_application_insights"
+  kms_master_key_id                        = data.aws_kms_alias.sns_kms_key_alias.target_key_id
+  application_failure_feedback_role_arn    = data.aws_iam_role.sns_failure_feedback.arn
+  application_success_feedback_role_arn    = data.aws_iam_role.sns_success_feedback.arn
+  application_success_feedback_sample_rate = 100
+  firehose_failure_feedback_role_arn       = data.aws_iam_role.sns_failure_feedback.arn
+  firehose_success_feedback_role_arn       = data.aws_iam_role.sns_success_feedback.arn
+  firehose_success_feedback_sample_rate    = 100
+  http_failure_feedback_role_arn           = data.aws_iam_role.sns_failure_feedback.arn
+  http_success_feedback_role_arn           = data.aws_iam_role.sns_success_feedback.arn
+  http_success_feedback_sample_rate        = 100
+  lambda_failure_feedback_role_arn         = data.aws_iam_role.sns_failure_feedback.arn
+  lambda_success_feedback_role_arn         = data.aws_iam_role.sns_success_feedback.arn
+  lambda_success_feedback_sample_rate      = 100
+  sqs_failure_feedback_role_arn            = data.aws_iam_role.sns_failure_feedback.arn
+  sqs_success_feedback_role_arn            = data.aws_iam_role.sns_success_feedback.arn
+  sqs_success_feedback_sample_rate         = 100
+  provider                                 = aws.region
+}