Javascript 如何将express中的GET请求重定向到另一台服务器

我需要捕获来自客户端的请求，更改头，将请求发送到另一台服务器

我怎么做？我尝试了这种方法，但我不知道如何发送整个请求，以便参数、数据等（如果存在）不会丢失

const express = require('express')
var request = require("request");
const app = express()
const port = 3000



 async function SEND_NEXT(Headers,params) {

    var data = {}
    await new Promise(res => request.get("http://localhost:4000", { json: data, headers: Headers, timeout: 15000 }, function (error, response, body) {
      if (error) { res({ "error": "timeout" }); } else {  }
    }));
   
    
   
  
  }


app.get("/*", (request, response) => {
    
  
    console.log(request.)
    request.headers['user-agent']="SOMETHING IN REQUEST"
    SEND_NEXT(request.headers,request.params)
    //console.log(response["req"]["headers"]["user-agent"])
    response.send('Hello from Express!')}
    
    
    )
app.listen(port, (err) => {
    if (err) {
        return console.log('something bad happened', err)
    }
    console.log(`server is listening on ${port}`)
})