Create Dockerfile

Dockerfile

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+FROM python:3.11-slim
+
+# Install curl for healthcheck (minimal dependency)
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    curl \
+    && rm -rf /var/lib/apt/lists/*
+
+# Set working directory
+WORKDIR /home/user/app
+
+# Create non-root user
+RUN useradd -m -u 1000 user
+USER user
+ENV HOME=/home/user \
+    PATH=/home/user/.local/bin:$PATH
+
+# Copy requirements first to leverage Docker cache
+COPY --chown=user requirements.txt .
+
+# Install dependencies
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy app files
+COPY --chown=user app.py presidio_helpers.py .
+
+# Expose Streamlit port
+EXPOSE 7860
+
+# Healthcheck
+HEALTHCHECK CMD curl --fail http://localhost:7860/_stcore/health || exit 1
+
+# Run Streamlit
+CMD ["streamlit", "run", "app.py", "--server.port=7860", "--server.address=0.0.0.0"]