| # Use a specific, slim Python version that satisfies all dependencies | |
| FROM python:3.11-slim | |
| # Create a non-root user for security best practices | |
| # The -m flag creates the user's home directory | |
| RUN useradd -m -u 1000 user | |
| # Switch to the non-root user | |
| USER user | |
| # Set up the environment PATH for the non-root user to find installed packages | |
| ENV PATH="/home/user/.local/bin:${PATH}" | |
| # Set the working directory inside the container | |
| WORKDIR /app | |
| # Copy and install dependencies first to leverage Docker layer caching | |
| # --chown ensures the 'user' owns the copied files, not 'root' | |
| COPY --chown=user:user requirements.txt . | |
| RUN pip install --no-cache-dir --upgrade -r requirements.txt | |
| # Copy the rest of the application files, including app.py and the nutritional_db folder | |
| COPY --chown=user:user . . | |
| # Expose the port that Streamlit will run on (this is good practice for documentation) | |
| EXPOSE 7860 | |
| # The command to run when the container starts. | |
| # Runs the Streamlit app on the correct port and makes it available to the host. | |
| CMD ["streamlit", "run", "app.py", "--server.port=7860", "--server.address=0.0.0.0"] | |