schermetto: readme explains keypress

README.md

@@ -31,6 +31,6 @@ a questo punto lancia `docker-compose up`
 
 ```
 apt install python3-websocket
-./utils/wsclient.py -k 'wss://localhost:8000/v1/ws/counter/0' | stdbuf -o0 jq .value |  ./schermetto/num_display.py  --no-fu --inve 4
+./utils/wsclient.py -k 'ws://localhost:8000/v1/ws/counter/0' | stdbuf -o0 jq .value |  ./schermetto/num_display.py  --no-fu --inve 4 --on-key 'env USER_PASSWORD=admin:changeme! ./utils/movecounter.sh'
 ```