package main import ( "fmt" "net/http" "os" ) func handler(w http.ResponseWriter, r *http.Request) { w.Header().Add("Content-Type", "text/html; charset=utf-8") fmt.Fprintf(w, "%s", os.Getenv("TEXT")) } func main() { fmt.Println("Listening on port 8080...") http.HandleFunc("/", handler) http.ListenAndServe(":8080", nil) }