Card: Revert first slash error

Author: lamATnginx

exampleSite/content/_index.md

@@ -7,10 +7,10 @@ description:
 Documentation for hugo theme
 {{<card-layout>}}
   {{<card-section showAsCards="true">}}
-    {{<card title="Test Product" titleUrl="test-product/" icon="test-tubes"  isLanding="true">}}
+    {{<card title="Test Product" titleUrl="/test-product/" icon="test-tubes"  isLanding="true">}}
       See explanations and usages of shortcodes
     {{</card >}}
-    {{<card title="NGINX Plus" titleUrl="nginx/" brandIcon="NGINX-Plus-product-icon-RGB.svg"  isLanding="true">}}
+    {{<card title="NGINX Plus" titleUrl="/nginx/" brandIcon="NGINX-Plus-product-icon-RGB.svg"  isLanding="true">}}
       See a live example of theme components
     {{</card >}}
   {{</card-section>}}

exampleSite/content/test-product/_index.md

@@ -54,7 +54,7 @@ This is a compilation of all our shortcodes to show how they look, function, res
 
 {{<card-layout >}}
   {{<card-section title="NGINX" showAsCards="true" >}}
-    {{<card title="NGINX Plus" titleUrl="nginx/" brandIcon="NGINX-Plus-product-icon-RGB" >}}
+    {{<card title="NGINX Plus" titleUrl="/nginx/" brandIcon="NGINX-Plus-product-icon-RGB.svg" >}}
       Installing NGINX
     {{</card >}}
   {{</card-section >}}

layouts/shortcodes/card.html

@@ -35,8 +35,7 @@
 {{- /* Build the url */ -}}
 {{ $url := printf "%s%s" .Page.Permalink $titleUrl }}
 {{ if eq (substr $titleUrl 0 1) "/" }}
-  {{ $suggestedUrlFix := substr $titleUrl 1 }} 
-  {{ errorf "Please do not start the param 'titleUrl' with a forward slash. Got: '%s', use '%s' instead." $titleUrl $suggestedUrlFix }}
+  {{ $url = printf "%s%s" .Site.BaseURL (substr $titleUrl 1) }}
 {{ else if (strings.Contains $titleUrl "https") }}
   {{ $url = $titleUrl }}
 {{ end }}