ADD COMMENT FUNCTION

mmistakes#33 
  provider : 

mmistakes#34
  disqus :

_config.yml

@@ -30,8 +30,8 @@ masthead_title           : # overrides the website title displayed in the masthe
 # breadcrumbs            : false # true, false (default)
 words_per_minute         : 200
 comments:
-  provider               : # false (default), "disqus", "discourse", "facebook", "staticman", "staticman_v2", "utterances", "custom"
-  disqus:
+  provider               : "disqus" # false (default), "disqus", "discourse", "facebook", "staticman", "staticman_v2", "utterances", "custom"
+  disqus: "sungmi67-github-io" 
     shortname            : # https://help.disqus.com/customer/portal/articles/466208-what-s-a-shortname-
   discourse:
     server               : # https://meta.discourse.org/t/embedding-discourse-comments-via-javascript/31963 , e.g.: meta.discourse.org