update readme

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Jun Kurihara 2022-08-25 14:44:56 +09:00
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@ -248,7 +248,7 @@ Basically, docker automatically manage your iptables if you use the port-mapping
However, we found that if you want to use the brand-new UDP-based protocol, HTTP/3, on `rpxy`, you need to explicitly expose your HTTPS port by using `ufw`-like command.
```
```bash
% sudo ufw allow 443
% sudo ufw enable
```