README: add ipv6 note

diff --git a/web/README b/web/README
index e377dbd..d23bdc8 100644 (file)
--- a/web/README
+++ b/web/README
@@ -7,6 +7,8 @@ Option:
 -h 0.0.0.0
 at the end to listen on all interfaces, i.e.
 FLASK_APP=seepark_web.py FLASK_DEBUG=1 SEEPARKINI=~/seewasser.ini flask run -h 0.0.0.0
+(or :: instead of 0.0.0.0 for ipv4+ipv6)
+
 
 Go to:
 http://127.0.0.1:5000/