Create Dockerfile

Dockerfile

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+# Use official Python runtime as base image
+FROM python:3.9-slim
+
+# Set working directory in container
+WORKDIR /app
+
+# Install system dependencies
+RUN apt-get update && apt-get install -y \
+    libgl1 \
+    libglib2.0-0 \
+    && 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 -r requirements.txt
+
+# Copy application code
+COPY app.py .
+COPY templates/ ./templates/
+
+# Create directory for OpenCV Haar cascades
+RUN mkdir -p /usr/share/opencv4/haarcascades/
+
+# Expose port
+EXPOSE 5000
+
+# Set environment variables
+ENV FLASK_APP=app.py
+ENV FLASK_ENV=production
+
+# Run the application
+CMD ["python", "app.py"]