content: # Start from Ubuntu 20.04
  FROM ubuntu:20.04
  
  # Set the working directory in the Docker image
  WORKDIR /opendilab
  
  # Install Python 3.8 and other dependencies
  # We update the apt package list, install Python 3.8, pip, compilers and other necessary tools.
  # After installing, we clean up the apt cache and remove unnecessary lists to save space.
  RUN apt-get update && \
      apt-get install -y python3.8 python3-pip gcc g++ swig git && \
      apt-get clean && \
      rm -rf /var/lib/apt/lists/*
  
  # Create a symbolic link for Python and pip
  # This makes it easy to call python and pip from any location in the container.
  RUN ln -s /usr/bin/python3.8 /usr/local/bin/python && \
      ln -s /usr/bin/pip3 /usr/local/bin/pip
  
  # Update pip and setuptools to the latest version
  # This step ensures that we have the latest tools for installing Python packages.
  RUN python -m pip install --upgrade pip setuptools
  
  # Clone the LightZero repository from GitHub
  # This step downloads the latest version of LightZero to our Docker image.
  RUN git clone https://github.com/opendilab/LightZero.git
  
  # Install the LightZero package in editable mode
  # The -e option allows us to edit the source code without needing to reinstall the package.
  RUN pip install -e ./LightZero
  