Update README and exampleSite

exampleSite/hugo.toml

@@ -75,6 +75,17 @@ enableRobotsTXT = true
   # information see layouts/partials/social_card.html
   generateSocialCard = true
 
+  # The number of posts to show on the index page. Defaults to 3 if not set.
+  postsToShowOnIndex = 3
+
+  # Enable upvoting on posts. When set to true, each post will display an upvote
+  # button that calls the API endpoint specified by `upvoteApi`.
+  upvotes = false
+
+  # The base URL of the upvote API. Only used when `upvotes = true`.
+  # The API is expected to handle GET and POST requests at {upvoteApi}/{post-path}.
+  upvoteApi = "https://example.com/api"
+
   # Social media. Delete any item you aren't using to make sure it won't show up
   # in your website's metadata.
   [params.social]