Add default image meta tag

config.toml

@@ -25,6 +25,8 @@ googleAnalytics = "UA-125057333-1"
   dateformNum     = "2006-01-02"
   dateformNumTime = "2006-01-02 15:04"
 
+  images = ["apple-touch-icon.png"]
+
   bgImg = "https://assets.xxxlbox.com/images/bg.jpg"
   gitUrl = "https://github.com/Track3/blog/commit/"