public static void RunExternalCode(IHost host)
        {
            /* 启动时初始化数据库(如果需要) */
            using (var scope = host.Services.CreateScope())
            {
                var services = scope.ServiceProvider;
                var config   = services.GetRequiredService <IConfiguration>();

                bool needDbInit = Convert.ToBoolean(config.GetSection("InitTask")["NeedDbInit"]);
                if (needDbInit)
                {
                    var db = services.GetServices <SqlSugarClient>().FirstOrDefault(a => a.CurrentConnectionConfig.ConfigId == CCDBConfig.MainDbKey);
                    //   ISqlSugarClient sqlsugarClient = services.GetRequiredService<SqlSugarClient>();
                    DbSeed.InitDb(db);
                }
            }
        }