chore: add cost calculator to homepage

Author: andrablaj

content/en/_index.md

@@ -21,12 +21,13 @@ cascade:
   {{< card link="reference-apps" title="Reference Apps" subtitle="Explore and get inspired by examples of CHT reference applications" icon="collection" >}}
   {{< card link="technical-overview" title="Technical Overview" icon="template" subtitle="Overview and architecture of CHT components" >}}
   {{< card link="community" title="Get Involved" subtitle="Do you want to get involved in the CHT Community? Here's how..." icon="arrow-circle-right" >}}
-  {{< card link="ai" title="AI & CHT" icon="server" subtitle="See what add-ons the CHT has available for AI assistance" >}}
+  {{< card link="ai" title="AI & CHT" icon="server" subtitle="See what add-ons the CHT has available for AI assistance" icon="lightning-bolt">}}
   {{< card link="community/contributing" title="Contribute" subtitle="See how to contribute code and documentation" icon="pencil-alt" >}}
   {{< card link="design" title="Design" icon="sparkles" subtitle="Design guidelines for developers and designers of digital health applications" >}}
   {{< card link="building" title="Build" icon="template" subtitle="Overview of features and reference guides for building CHT Applications" >}}
-  {{< card link="/hosting" title="Host" icon="server" subtitle="Guides for hosting, maintaining, and monitoring CHT applications" >}}
+  {{< card link="hosting" title="Host" icon="server" subtitle="Guides for hosting, maintaining, and monitoring CHT applications" >}}
   {{< card link="releases" title="Releases" subtitle="See what's new in CHT Core" icon="rocket-launch" >}}
+  {{< card link="hosting/cht/costs" title="Cost Calculator" subtitle="A guide for calculating CHT hosting costs" icon="calculator" >}}
 {{< /cards >}}
 
 {{< hextra/hero-subtitle style="margin:20px 0">}}