FROM python:3.9-slim

# Set the working directory inside the container
WORKDIR /app

# Copy all files form the current directory to the container's working directory
COPY . .

# Install all dependencies from the requirements file without using cache to reduce image size
RUN pip install --no-cache-dir --upgrade -r requirements.txt

# Define the command to start the application using Gunicorn with 4 worker processes
# - '-w 4' : Uses 4 wroker processes for handling the requests
# - '-b 0.0.0.0:7860': Binds the server to the port 7860 on all network interfaces
# - 'app:app': Runs the flask app
CMD ["gunicorn", "-w", "4", "-b", "0.0.0.0:7860", app:sales_forecast_api]