local:
  build: local
  restart: always
  ports:
    - "9010:80"
  depends_on:
    - local_support

local_support:
  build: local/go-docker
  restart: always
  environment:
    - ADDR=:80
# flag would be here
    - FLAG=spbctf{}

package main

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

func indexHandler(w http.ResponseWriter, r *http.Request) {
	flag, _ := os.LookupEnv("FLAG")

	w.Write([]byte(flag))
}

func main() {
	http.HandleFunc("/", indexHandler)

	addr, _ := os.LookupEnv("ADDR")
	log.Fatal(http.ListenAndServe(addr, nil))
}