Dockerfile

# Use an official Python slim image for the base
FROM python:3.10-slim

# Set the working directory
WORKDIR /app

# Install dependencies: wget, apt-transport-https, gnupg2, NuGet, and Python pip
RUN apt-get update && apt-get install -y \
    wget \
    apt-transport-https \
    gnupg2 \
    unzip \
    nuget \
    && apt-get install -y python3-pip \
    && rm -rf /var/lib/apt/lists/*

# Install Roslyn via NuGet
RUN nuget install Microsoft.Net.Compilers -Version 4.0.1 -OutputDirectory /usr/local/roslyn

# Add Roslyn compiler (csc) to PATH
ENV PATH="/usr/local/roslyn/Microsoft.Net.Compilers.4.0.1/tools:${PATH}"

# Create a non-root user and set it as the user for the rest of the image
RUN useradd -ms /bin/bash appuser

# Ensure the /app directory is owned by the non-root user
RUN chown -R appuser:appuser /app

# Switch to the non-root user
USER appuser

# Copy the requirements file with the correct owner
COPY --chown=appuser:appuser ./requirements.txt /app/requirements.txt

# Install Python dependencies
RUN pip3 install --no-cache-dir --upgrade -r /app/requirements.txt

# Copy the Flask app files
COPY --chown=appuser:appuser . .

# Expose the port the app runs on
EXPOSE 7860

# Command to run the Flask app
CMD ["python3", "main.py"]