Add site favicon and touch icon assets

Author: brian033

index.html

@@ -7,6 +7,9 @@
       name="description"
       content="c4Lab builds computational solutions for biological problems across genomics, multi-omics, and precision medicine."
     />
+    <link rel="icon" type="image/png" sizes="32x32" href="/images/icons/favicon-32x32.png" />
+    <link rel="apple-touch-icon" sizes="180x180" href="/images/icons/apple-touch-icon.png" />
+    <link rel="icon" type="image/png" sizes="192x192" href="/images/icons/android-chrome-192x192.png" />
     <title>c4Lab</title>
     <!-- SPA redirect handler for GitHub Pages 404.html workaround -->
     <script>