main.go

package main

import (
   "fmt"
   "log"
   "net/http"
)

func main() {
   http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
       log.Println("received request")
       fmt.Fprintf(w, "Hello Docker!!")
   })

   log.Println("start server")
   server := &http.Server{Addr: ":8080"}
   if err := server.ListenAndServe(); err != nil {
       log.Println(err)
   }
}