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+# Fill in the base image with the correct Python version (e.g., python:3.9)
+FROM python:3.9-slim
+
+# Fill in the username to be created (e.g., user)
+RUN useradd -m -u 1000 appuser
+
+# Blank #3: Specify the username for subsequent commands (e.g., user)
+USER appuser
+
+# Fill in the username in the PATH environment variable (e.g., user)
+ENV PATH="/home/appuser/.local/bin:$PATH"
+
+# Set working directory
+WORKDIR /app
+
+# Use the same username for file ownership when copying requirements (e.g., user)
+COPY --chown=appuser ./requirements.txt requirements.txt
+RUN pip install --no-cache-dir --upgrade -r requirements.txt
+
+# Use the same username for file ownership when copying the app files (e.g., user)
+COPY --chown=appuser . /app
+
+# Start the Streamlit app on port 7860, the default port expected by Spaces
+CMD ["streamlit", "run", "app.py", "--server.port=7860", "--server.address=0.0.0.0"]
+# Reference: https://huggingface.co/docs/hub/en/spaces-sdks-docker