add og_image

Author: frillweeman

_config.yml

@@ -94,7 +94,7 @@ facebook:
   username               :
   app_id                 :
   publisher              :
-og_image                 : # Open Graph/Twitter default site image
+og_image                 : /assets/images/falcon.jpg
 # For specifying social profiles
 # - https://developers.google.com/structured-data/customize/social-profiles
 social: