[IT-4498] Setup redirect for apex domain (#1457)

Use S3 and cloudfront to setup a redirect from
treat-ad.org to treatad.org

Author: zaro0508

org-formation/800-redirects/_tasks.yaml

@@ -405,3 +405,21 @@ ModelAdExplorerProdAppDnsForward:
     SourceHostedZoneId: "Z038526037U7WWZ1418M6"
     # the value of the CNAME record
     TargetHostName: !CopyValue ['model-ad-prod-load-balancer-dns', !Ref AgoraProdAccount]
+
+# Issue IT-4498, redirect treat-ad.org to treatad.org
+TreatAdApexRedirect:
+  Type: update-stacks
+  Template: https://raw.githubusercontent.com/Sage-Bionetworks/aws-infra/v0.4.8/templates/s3-redirector.yaml
+  StackName: !Sub '${resourcePrefix}-treatad-redirect'
+  StackDescription: Setup a redirect from treat-ad.org to treatad.org
+  DefaultOrganizationBindingRegion: !Ref primaryRegion
+  DefaultOrganizationBinding:
+    Account: !Ref SageITAccount
+  Parameters:
+    # the endpoint we are redirecting from
+    SourceHostName: "treat-ad.org"
+    SourceAcmCertificateArn: "arn:aws:acm:us-east-1:797640923903:certificate/278a1102-c60d-4f51-81c0-6b1ca767945d"
+    # ID of the sageit.org zone (in sageit account)
+    SourceHostedZoneId: "Z08344463B10GP0C3L4G6"
+    # the endpoint we are redirecting to (AWS VPN client self service)
+    TargetHostName: "treatad.org"