add index and publication to index

index.md

@@ -59,6 +59,18 @@ The How-to cards are intended to provide practical guidance in implementing Data
             "icon": "<i class=\"large material-icons\">science</i>",
             "link": "{{ '/cards#lab' | relative_url }}"
         },
+        {
+            "title": "Publication",
+            "caption": "I want to publish my article",
+            "icon": "<i class=\"large material-icons\">menu_book</i>",
+            "link": "{{ '/cards#publication' | relative_url }}"
+        },
+        {
+            "title": "PPC",
+            "caption": "I need information on the pre-publication check (PPC)",
+            "icon": "<i class=\"large material-icons\">fact_check</i>",
+            "link": "{{ '/cards#ppc' | relative_url }}"
+        }
     ];
 
     document.addEventListener('DOMContentLoaded', function() {