feat: Use a dropdown to indicate the values for the Secure URL

Author: Néstor Salceda

templates/CloudVision.yaml

@@ -99,7 +99,11 @@ Parameters:
     NoEcho: true
   SysdigSecureEndpoint:
     Type: String
-    Default: "https://secure.sysdig.com"
+    AllowedValues:
+      - https://secure.sysdig.com
+      - https://us2.app.sysdig.com
+      - https://eu1.app.sysdig.com
+    Default: https://secure.sysdig.com
 
 Conditions:
   RequiresCloudTrail: !Equals [!Ref ExistentCloudTrailSNSTopic, ""]