更新了mongodb config

am_mongo/mongo.go

@@ -9,10 +9,10 @@ import (
 )
 
 type MongoDB struct {
-	Host     string
-	Port     string
-	Username string
-	Password string
+	Host     string `json:"host"`
+	Port     string `json:"port"`
+	Username string `json:"username"`
+	Password string `json:"password"`
 	Client   *mongo.Client
 	DB       *mongo.Database
 }