Update docker README.md

docker/README.md

@@ -18,4 +18,27 @@ NavRover is a ROS-based project designed for autonomous navigation. This reposit
 
 To build the Docker image, navigate to the `docker` directory and run the following command:
 
-./build_docker.sh
+
+    ./build_docker.sh
+
+
+This script will build the Docker image with the name `navrover`. Ensure that the build completes successfully.
+
+## Running the Docker Container
+
+To run the Docker container, execute the following command:
+
+
+    ./run_docker.sh
+
+
+This script will check for NVIDIA runtime availability and run the container accordingly, enabling GPU support if available.
+
+### Environment Variables
+
+- `DISPLAY`: Set to `:0` for X11 forwarding.
+- `XDG_RUNTIME_DIR`: Set to `/tmp/runtime-root` for GUI applications.
+
+## Entry Point
+
+The entry point for the Docker container is defined in `entrypoint.sh`, which sets up the ROS environment and executes the command passed to the container.