added cover for the homepage

Author: AlBovo

hugo.yaml

@@ -81,9 +81,11 @@ params:
   #     SiteVerificationTag: "XYZabc"
 
   cover:
-    hidden: true # hide everywhere but not in structured data
-    hiddenInList: true # hide on list pages and home
-    hiddenInSingle: true # hide on single page
+    image: "https://pascalctf.it/embed.png" # image path/url
+    alt: "PascalCTF's logo" # alt text
+    caption: "Homepage of the PascalCTF" # display caption under cover
+    relative: false # when using page bundles set this to true
+    hidden: true # only hide on current single page
 
   editPost:
     URL: "https://github.com/PascalCTF/PascalCTF.github.io"