Dockerfile

FROM python:3.9-slim

# This ENV var tells Debian-based images like this one to be non-interactive.
ENV DEBIAN_FRONTEND=noninteractive

# Set the working directory
WORKDIR /code

# Copy just the requirements file to leverage Docker cache
COPY requirements.txt .

# Install dependencies
RUN pip install --no-cache-dir -r requirements.txt

# Copy the rest of the application
COPY . .

# This command will be run when the container starts
CMD ["python", "app.py"]