Remove echoes

dockerfiles/ros_entrypoint.sh

-#!/bin/bash
+#!/usr/bin/env bash
 
-# Setup ros environment
+# Check if the shell is Bash or Zsh
+if [ -n "$BASH_VERSION" ]; then
+    # Bash
     source "/opt/ros/$ROS_DISTRO/setup.bash"
+elif [ -n "$ZSH_VERSION" ]; then
+    # Zsh
+    source "/opt/ros/$ROS_DISTRO/setup.zsh"
+else
+    echo "Unknown shell. This script is designed for Bash and Zsh."
+    return 1
+fi
+
 exec "$@"