update server_config.json with AuthTokenSaveTo

server_config.json

@@ -2,5 +2,6 @@
     "Token": "skdq8vklaurfqemfszuif",
     "EncodingAESKey": "cmtWK2teRnLOXyO5dw7lJkETv9jCeNAqYyguEu5D8gG",
     "Appid": "wx876e233fde456b7b",
-    "AppSecret": "4a91aa328569b10a9fb97adeb8b0af58"
+    "AppSecret": "4a91aa328569b10a9fb97adeb8b0af58",
+    "AuthTokenSaveTo": "/tmp/wechat_hitxy_token"
 }