Update the heroku example to use 0.0.0.0 as ip
On heroku we canno't bind on 127.0.0.1
@@ -37,7 +37,7 @@ async fn main() {
.parse()
.expect("PORT env variable value is not an integer");
- let addr = ([127, 0, 0, 1], port).into();
+ let addr = ([0, 0, 0, 0], port).into();
// Heroku host example: "heroku-ping-pong-bot.herokuapp.com"
let host = env::var("HOST").expect("HOST env variable is not set");
