Dockerfile

# Use an official Python runtime as a parent image
FROM python:3.9-slim

# Set working directory in the container
WORKDIR /app

# Set environment variables
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PORT=8080

# Install dependencies first for better layer caching
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Copy project files
COPY . .

# Make sure templates directory exists
RUN mkdir -p templates

# Create data directory if it doesn't exist
RUN mkdir -p /data && chmod 777 /data

# Make port 8080 available to the world outside this container
EXPOSE 8080

# Define health check
HEALTHCHECK --interval=30s --timeout=5s --start-period=5s --retries=3 \
  CMD curl -f http://localhost:8080/health || exit 1

# Run the application when the container launches
CMD ["python", "app.py"]