main, server: refactored code

Author: GopherSuslik

main.go

@@ -16,7 +16,7 @@ func main() {
 
 	host := os.Getenv("CHAT_HOST")
 	port := os.Getenv("CHAT_PORT")
-	srv := newServer(host, port)
+	srv := newServer(host + ":" + port)
 
 	go func() {
 		if err := srv.start(); err != nil {

server.go

@@ -9,10 +9,10 @@ type server struct {
 	httpServer *http.Server
 }
 
-func newServer(host, port string) *server {
+func newServer(addr string) *server {
 	return &server{
 		httpServer: &http.Server{
-			Addr: host + ":" + port,
+			Addr: addr,
 		},
 	}
 }