Dockerfile

FROM ubuntu:18.04

# 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/

# Install required system packages and Python 3.6
RUN apt-get update && apt-get install -y \
    software-properties-common \
    wget \
    curl \
    tar \
    bash \
    rsync \
    gcc \
    libfreetype6-dev \
    libhdf5-dev \
    libpng-dev \
    libzmq5-dev \
    unzip \
    pkg-config \
    graphviz \
    openjdk-8-jdk \
    python3.5 \
    python3.5-dev \
    python3-pip \
    ant \
    ca-certificates \
    && apt-get clean \
    && update-ca-certificates -f

# Upgrade pip for Python 3.6
RUN python3.5 -m pip install --upgrade pip setuptools

# Install Python dependencies
COPY requirements.txt /tmp/requirements.txt
RUN python3.5 -m pip install --no-cache-dir -r /tmp/requirements.txt

# Create a new user
RUN useradd -m -u ${NB_UID} ${NB_USER}

# Switch to the new user
USER ${NB_USER}

# Set user-specific environment variables
ENV HOME=/home/${NB_USER}
ENV PATH=/home/${NB_USER}/.local/bin:$PATH

# Copy application code to the container
COPY --chown=${NB_USER}:${NB_USER} . ${HOME}

# Expose port for Streamlit
EXPOSE 7860

# Define the entry point for the container
ENTRYPOINT ["streamlit", "run", "app.py", "--server.port=7860", "--server.address=0.0.0.0"]