go-proxy/main.go

package main

import (
	"fmt"
	"log"
	"net/http"
	"net/http/httputil"
	"net/url"
	"os"
)

func main() {
	url, err := url.Parse(fmt.Sprintf("http://%s", os.Getenv("DESTINATION_ADDR")))
	if err != nil {
		log.Fatal(err)
	}

	proxy := httputil.NewSingleHostReverseProxy(url)
	log.Fatal(http.ListenAndServe(os.Getenv("SOURCE_ADDR"), proxy))
}