added CRM cache website url

configCRM.go

@@ -21,6 +21,10 @@ type EspoCRMAPIConfig struct {
 
 	//where attachment is cached
 	AttachmentCache string `json:"AttachmentCache"`
+
+	//where cache site is provding attachment access
+	//temporary
+	CacheSiteURL string `json:"CacheSiteURL"`
 }
 
 //CRMConfig contains secrets that cannot store in source file