fix nodes startup (#2138)

bridges/README.md

@@ -242,7 +242,7 @@ To run a Rialto node for example, you can use the following command:
 ```bash
 docker run -p 30333:30333 -p 9933:9933 -p 9944:9944 \
   -it paritytech/rialto-bridge-node --dev --tmp \
-  --rpc-cors=all --unsafe-rpc-external --unsafe-ws-external
+  --rpc-cors=all --unsafe-rpc-external
 ```
 
 ## Community