callback 转换到 promise

     new Proxy(docker,{
      get : function (obj,name) {
        return function (arg) {
          let length = arguments.length
          if (length<=1) {
            return obj[name]
          }
          
          arg = Array.prototype.slice(0)
          return new Promise(function(resolve,reject){
            arg[length-1] = function(err,data){
              if(err)return reject(err)
              resolve(data)
            } 
          })
        }
      }
    })