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

# Set the working directory in the container
WORKDIR /app

# Copy the requirements file into the container at /app
COPY requirements.txt .

# Install any needed packages specified in requirements.txt
RUN pip install --no-cache-dir -r requirements.txt

# Copy the aplication script into the container at /app
COPY webhook_listener.py .

# Expose the port the app runs on
EXPOSE 8000

#
# The crucial command to run the application
# It tells Gunicorn to run the 'app' object from the 'webhook_listener' file.
#
CMD ["gunicorn", "--bind", "0.0.0.0:8000", "--workers", "3", "webhook_listener:app"]