add ubuntu toolchain Dockerfile

Chapter04/Dockerfile

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+# Use Ubuntu 20.04 LTS as the base image
+FROM ubuntu:20.04
+
+# Avoid prompts from apt
+ENV DEBIAN_FRONTEND=noninteractive
+
+# Install required packages
+RUN apt-get update && apt-get install -y \
+    wget \
+    xz-utils \
+    libncursesw5 \
+    software-properties-common \
+    cmake \ 
+    make \
+    && add-apt-repository ppa:deadsnakes/ppa \
+    && apt-get update \
+    && apt-get install -y python3.8 python3.8-distutils \
+    && rm -rf /var/lib/apt/lists/*
+
+# Set Python 3.8 as the default python3
+RUN update-alternatives --install /usr/bin/python3 python3 /usr/bin/python3.8 1
+
+# Download and extract arm-none-eabi-gcc
+RUN wget -O arm-gnu-toolchain.tar.xz "https://developer.arm.com/-/media/Files/downloads/gnu/13.2.rel1/binrel/arm-gnu-toolchain-13.2.rel1-x86_64-arm-none-eabi.tar.xz?rev=e434b9ea4afc4ed7998329566b764309&hash=CA590209F5774EE1C96E6450E14A3E26" \
+    && tar -xf arm-gnu-toolchain.tar.xz -C /opt/ \
+    && rm arm-gnu-toolchain.tar.xz
+
+# Download and unpack Renode
+RUN wget https://github.com/renode/renode/releases/download/v1.15.0/renode-1.15.0.linux-portable.tar.gz \
+    && tar -xzvf renode-1.15.0.linux-portable.tar.gz -C /opt/ \
+    && rm renode-1.15.0.linux-portable.tar.gz
+
+# Add the toolchain and Renode bin directories to PATH
+ENV PATH="/opt/arm-gnu-toolchain-13.2.Rel1-x86_64-arm-none-eabi/bin:/opt/renode_1.15.0_portable:${PATH}"
+
+# Set the working directory
+WORKDIR /workspace
+
+# Keep the container running
+CMD ["sleep", "infinity"]
+