fix volcume Permission denied issue, with some little changes in README

Dockerfile

@@ -20,7 +20,7 @@ RUN /bin/bash -c "source activate $CONDA_ENV_NAME && \
     mamba install xeus-cling -c conda-forge --yes"
 
 # Switch back to non-root user
-USER $NB_UID
+# USER $NB_UID
 
 #Install the Kernel Spec
 RUN /bin/bash -c "source activate $CONDA_ENV_NAME && \

README.md

@@ -1,19 +1,24 @@
 # Cling-Jupyter Docker
 
-This repository provides a Dockerfile for running Jupyter Notebooks with [xeus-cling](https://github.com/jupyter-xeus/xeus-cling).
+This repository provides a Dockerfile for running [cling](https://github.com/root-project/cling) with [Jupyter Notebooks](https://jupyter.org/) using [xeus-cling](https://github.com/jupyter-xeus/xeus-cling).
 
 ## Getting Started
 
 ### Pull & Run
 
+To pull the Docker image, use the following command:
 ```bash
  docker pull p01arn0va/cling-jupyter
- docker run -it -v ~/Documents/workspace:/home/jovyan/work -p8888:8888 --rm cling-jupyter:latest
+```
+
+Here is an example of how to run the Docker image:
+```bash
+docker run -it --rm -p8888:8888 -v $PWD:/home/jovyan/work p01arn0va/cling-jupyter
 ```
 
 ### Building the Docker Image
 
-To build the Docker image locally, run the following command in the repository's root directory:
+To build the Docker image locally, run the following command in the repository’s root directory:
 
 ```bash
 docker build -t cling-jupyter .