Update README.md

Author: yaacov

README.md

@@ -89,6 +89,7 @@ podman run --rm --network host -it quay.io/yaacov/rose-go-driver:latest --port 8
 podman run --rm --network host -it \
   -v $(pwd)/:/driver:z \
   -e DRIVER=/driver/mydriver.py \
+  -e PORT=8081 \
   quay.io/rose/rose-game-ai:latest
 ```