Update Dockerfile

Dockerfile

@@ -1,11 +1,11 @@
-# Download base image ubuntu 
-FROM ubuntu
+# Download base image ubuntu 22.04 (latest LTS as of 2024)
+FROM ubuntu:22.04
 
 # Set environment variables
 ENV NB_USER jovyan
 ENV NB_UID 1000
 ENV HOME /home/${NB_USER}
-ENV JAVA_HOME /usr/lib/jvm/java-8-openjdk-amd64/
+ENV JAVA_HOME /usr/lib/jvm/java-17-openjdk-amd64/
 
 # Install required packages
 RUN apt-get update && apt-get install -y \
@@ -15,31 +15,32 @@ RUN apt-get update && apt-get install -y \
     rsync \
     gcc \
     libfreetype6-dev \
-    libhdf5-serial-dev \
+    libhdf5-dev \
     libpng-dev \
     libzmq3-dev \
-    python \
-    python-dev \
-    python-pip \
+    python3 \
+    python3-dev \
+    python3-pip \
     unzip \
     pkg-config \
     software-properties-common \
     graphviz \
-    openjdk-8-jdk \
+    openjdk-17-jdk \
     ant \
     ca-certificates-java \
     && apt-get clean \
     && update-ca-certificates -f
 
-# Install Python 3.8 and pip
+# Install Python 3.11 and pip (latest stable Python as of 2024)
 RUN add-apt-repository ppa:deadsnakes/ppa \
     && apt-get update \
-    && apt-get install -y python python3-pip \
+    && apt-get install -y python3.11 python3.11-dev python3-pip \
     && apt-get clean
 
 # Set up JAVA_HOME
-RUN echo "export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64/" >> /etc/profile \
+RUN echo "export JAVA_HOME=/usr/lib/jvm/java-17-openjdk-amd64/" >> /etc/profile \
     && echo "export PATH=\$JAVA_HOME/bin:\$PATH" >> /etc/profile
+
 # Create a new user named "jovyan" with user ID 1000
 RUN useradd -m -u ${NB_UID} ${NB_USER}
 
@@ -50,17 +51,17 @@ USER ${NB_USER}
 ENV HOME=/home/${NB_USER} \
     PATH=/home/${NB_USER}/.local/bin:$PATH
 
-# Set up PySpark to use Python 3.8 for both driver and workers
-ENV PYSPARK_PYTHON=/usr/bin/python
-ENV PYSPARK_DRIVER_PYTHON=/usr/bin/python
+# Set up PySpark to use Python 3.11 for both driver and workers
+ENV PYSPARK_PYTHON=/usr/bin/python3.11
+ENV PYSPARK_DRIVER_PYTHON=/usr/bin/python3.11
 
 # Set the working directory to the user's home directory
 WORKDIR ${HOME}
 
 # Upgrade pip and install Python dependencies
-RUN python -m pip install --upgrade pip
+RUN python3.11 -m pip install --upgrade pip
 COPY requirements.txt /tmp/requirements.txt
-RUN python -m pip install -r /tmp/requirements.txt
+RUN python3.11 -m pip install -r /tmp/requirements.txt
 
 # Copy the application code into the container at /home/jovyan
 COPY --chown=${NB_USER}:${NB_USER} . ${HOME}