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Dockerfile
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Dockerfile
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# Use an official Python runtime as a parent image
FROM python:3.9-slim
# Set the working directory in the container
WORKDIR /app
# Install system dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
gcc \
libc6-dev \
&& rm -rf /var/lib/apt/lists/*
# Copy just the requirements.txt first to leverage Docker cache
COPY ./requirements.txt /app/requirements.txt
# Install Python dependencies
RUN pip install --no-cache-dir -r requirements.txt
# Copy the rest of the application
COPY . /app
# Create a non-root user and switch to it
RUN adduser --disabled-password --gecos '' myuser
USER myuser
# Expose the port the app runs on
EXPOSE 5000
# Set environment variables
ENV FLASK_APP=app.py \
FLASK_RUN_HOST=0.0.0.0 \
FLASK_ENV=production
# Use Gunicorn to run the application
CMD ["gunicorn", "--workers=4", "--bind=0.0.0.0:5000", "app:app"]