Add step to open `443/udp` for HTTP/3

The "WWW Secure" application profile only includes `443/tcp` (there is no named application profile for HTTP/3).

diff --git a/README.md b/README.md
index fbdcd3ae965635712a6d916d26c30d006afc1e09..efed8715524d41579478181dc7edc1cf2c639c6a 100644 (file)
--- a/README.md
+++ b/README.md
@@ -37,10 +37,11 @@ Explanation:
 sudo ./setup.sh
 ```
 
-5. Open port 443 to allow access over HTTPS:
+5. Open port 443 to allow access over HTTPS (UDP for HTTP/3):
 
 ```
 sudo ufw allow "WWW Secure"
+sudo ufw allow 443/udp
 ```
 
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