fix(aws-cloudfront, nextjs-component): fix aliases updating when domain is used (#731)

Author: dphang

packages/serverless-components/domain/utils.js

@@ -408,19 +408,23 @@ const addDomainToCloudfrontDistribution = async (
   params.Id = subdomain.distributionId;
 
   // 5. then make our changes
-  params.DistributionConfig.Aliases.Items.push(subdomain.domain);
+  params.DistributionConfig.Aliases = {
+    Items: [subdomain.domain]
+  };
+
   if (subdomain.domain.startsWith("www.")) {
     if (domainType === "apex") {
-      params.DistributionConfig.Aliases.Items[
-        params.DistributionConfig.Aliases.Items.length - 1
-      ] = `${subdomain.domain.replace("www.", "")}`;
+      params.DistributionConfig.Aliases.Items = [
+        `${subdomain.domain.replace("www.", "")}`
+      ];
     } else if (domainType !== "www") {
       params.DistributionConfig.Aliases.Items.push(
         `${subdomain.domain.replace("www.", "")}`
       );
     }
   }
 
+  // Update aliases quantity to reflect actual number of items
   params.DistributionConfig.Aliases.Quantity =
     params.DistributionConfig.Aliases.Items.length;