add guestbook

config.toml

@@ -93,3 +93,17 @@ u_key = "https://public.posixlycorrect.com/pki/A8981D346F8F4130CA16A7775517E687F
 # https://webmention.io/settings
 enable = true
 domain = "posixlycorrect.com"
+
+
+[extra.isso]
+enabled_for_all_posts = false
+automatic_loading = true
+endpoint_url = "http://isso.posixlycorrect.com"
+page_id_is_slug = true
+lang = ""
+max_comments_top = "inf"
+max_comments_nested = "5"
+avatar = false
+voting = true
+page_author_hashes = ""
+lazy_loading = true