Dockerfile

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

# Set the working directory
WORKDIR /app

# Install dependencies: Mono, wget, and Python pip
RUN apt-get update && apt-get install -y \
    wget \
    apt-transport-https \
    && apt-get install -y gnupg2 \
    && echo "deb https://download.mono-project.com/repo/debian stable main" >> /etc/apt/sources.list.d/mono-official-stable.list \
    && wget -qO - https://download.mono-project.com/repo/xamarin.gpg | apt-key add - \
    && apt-get update && apt-get install -y mono-complete \
    && apt-get install -y python3-pip \
    && rm -rf /var/lib/apt/lists/*

# 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

# Create necessary directories and set permissions
RUN mkdir -p /app/uploads /home/appuser/.mono && \
    chmod -R 777 /app/uploads /home/appuser/.mono

# Set the MONO_HOME environment variable
ENV MONO_HOME="/home/appuser/.mono"
# Add the Mono tools directory to PATH
ENV PATH="${PATH}:${MONO_HOME}/bin:/usr/bin"

# Ensure mcs is in the PATH
RUN echo $PATH && which mcs

# 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"]