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Dockerfile

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+# Use Python 3.11 slim image as base
+FROM python:3.11-slim
+
+# Set working directory in container
+WORKDIR /app
+
+# Set environment variables
+ENV PYTHONDONTWRITEBYTECODE=1 \
+    PYTHONUNBUFFERED=1 \
+    FLASK_APP=app.py \
+    FLASK_ENV=production
+
+# Install system dependencies
+RUN apt-get update && apt-get install -y \
+    gcc \
+    finger \
+    && rm -rf /var/lib/apt/lists/*
+
+# Copy requirements first to leverage Docker cache
+COPY requirements.txt .
+
+# Install Python dependencies
+RUN pip install --no-cache-dir --upgrade pip && \
+    pip install --no-cache-dir -r requirements.txt
+
+# Copy application code
+COPY . .
+
+# Create non-root user for security
+RUN adduser --disabled-password --gecos '' appuser && \
+    chown -R appuser:appuser /app
+USER appuser
+
+# Expose port
+EXPOSE 5000
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=30s --start-period=5s --retries=3 \
+    CMD curl -f http://localhost:5000/ || exit 1
+
+# Run the application
+CMD ["python", "app.py"]