add comments

pkg/settings/setting_container.go

@@ -1,13 +1,16 @@
 package settings
 
+// ConfigContainer contains the current setting config
 type ConfigContainer struct {
 	Current *Config
 }
 
+// Initialize a config container singleton instance
 var (
 	Container = &ConfigContainer{}
 )
 
+// SetCurrentConfig sets the current config by a given config
 func SetCurrentConfig(config *Config) {
 	Container.Current = config
 }