Update Dockerfile

Dockerfile

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+FROM python:3.9-slim
+
+# Set working directory
+WORKDIR /app
+
+# Install system dependencies
+RUN apt-get update && apt-get install -y \
+    libglib2.0-0 \
+    libsm6 \
+    libxext6 \
+    libxrender-dev \
+    libgomp1 \
+    libglib2.0-0 \
+    libgtk-3-0 \
+    python3-opencv \
+    libopencv-dev \
+    && rm -rf /var/lib/apt/lists/*
+
+# Copy requirements first for better caching
+COPY requirements.txt .
+
+# Install Python dependencies
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy application code
+COPY . .
+
+# Create necessary directories
+RUN mkdir -p static/known_faces
+RUN mkdir -p templates
+
+# Set environment variables
+ENV FLASK_APP=app.py
+ENV FLASK_ENV=production
+ENV PYTHONPATH=/app
+
+# Expose port
+EXPOSE 7860
+
+# Create a non-root user
+RUN useradd -m -u 1000 appuser && chown -R appuser:appuser /app
+USER appuser
+
+# Run the application
+CMD ["gunicorn", "--bind", "0.0.0.0:7860", "--workers", "1", "--timeout", "120", "app:app"]