Serving HTTP requests using a Go binary file and Supervisor in Ubuntu

hello.go

package main

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

func main() {
	port := os.Getenv("PORT")
	if port == "" {
		port = "8000"
	}

	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
		w.Write([]byte(fmt.Sprintf("Hello from port %s", port)))
	})

	fmt.Printf("Listening on :%s\n", port)
	http.ListenAndServe(fmt.Sprintf(":%s", port), nil)
}

hello1.conf

[program:hello1]
command=/home/ubuntu/hello/hello_bin
directory=/home/ubuntu/hello
user=ubuntu
autostart=true
autorestart=true
stderr_logfile=/var/log/hello1.err.log
stdout_logfile=/var/log/hello1.out.log

hello2.conf

[program:hello2]
command=/home/ubuntu/hello/hello_bin
directory=/home/ubuntu/hello
user=ubuntu
autostart=true
autorestart=true
stderr_logfile=/var/log/hello2.err.log
stdout_logfile=/var/log/hello2.out.log
environment=PORT=8001

[group:hello]
programs=hello1,hello2