Merge pull request #270 from Russ-K/issue/247/booleans

Add validation for boolean CloudFormation template parameters

cloudformation/template.yaml

@@ -112,11 +112,19 @@ Parameters:
     Type: String
     Description: Only applicable if creating a custom domain name for your dev portal. Defaults to false, and you'll need to provide your own nameserver hosting. If set to true, a Route53 HostedZone and RecordSet are created for you.
     Default: 'false'
+    AllowedValues: 
+      - 'false'
+      - 'true'
+    ConstraintDescription: Malformed input - Parameter UseRoute53Nameservers value must be either 'true' or 'false'
 
   DevelopmentMode:
     Type: String
     Description: Enabling this weakens security features (OAI, SSL, site S3 bucket with public read ACLs, Cognito callback verification, CORS, etc.) for easier development. It also breaks frontend routing (except to /index.html), including deep linking and page refresh. Do not enable this in production! Additionally, do not update a stack that was previously in development mode to be a production stack; instead, make a new stack that has never been in development mode.
     Default: 'false'
+    AllowedValues: 
+      - 'false'
+      - 'true'
+    ConstraintDescription: Malformed input - Parameter DevelopmentMode value must be either 'true' or 'false'
 
 Conditions:
   UseCustomDomainName: !And [!And [!Not [!Equals [!Ref CustomDomainName, '']], !Not [!Equals [!Ref CustomDomainNameAcmCertArn, '']]], !Condition NotDevelopmentMode]