updated regex in lambda function and updated deploy readme

deploy/README.md

@@ -6,7 +6,7 @@ Use the following command to deploy a CloudFormation stack using the template in
 aws cloudformation deploy \
     --template-file docs-website.yml \
     --stack-name="${STACK_NAME}" \
-    --capabilities CAPABILITY_IAM /
+    --capabilities CAPABILITY_IAM \
     --no-execute-changeset \
     --parameter-overrides \
         AcmCertificateArn="${ACM_ARN}" \

deploy/docs-website.yml

@@ -156,7 +156,7 @@ Resources:
             removeTrailingSlash: false,
           };
 
-          const regexSuffixless = /\/[^/.]+$/; // e.g. "/some/page" but not "/", "/some/" or "/some.jpg"
+          const regexSuffixless = /\/[a-z0-9]+([0-9\.]+)?$/; // e.g. "/some/page" but not "/", "/some/" or "/some.jpg"
           const regexTrailingSlash = /.+\/$/; // e.g. "/some/" or "/some/page/" but not root "/"
 
           exports.handler = function handler(event, context, callback) {
@@ -170,7 +170,7 @@ Resources:
               callback(null, request);
               return;
             }
-            
+
             // Append "index.html" to origin request
             if (appendToDirs && uri.match(regexTrailingSlash)) {
               request.uri = uri + appendToDirs;