Add Dockerfile for containerized deployment

Dockerfile

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+FROM python:3.11-slim
+
+# Install system dependencies required for Playwright
+RUN apt-get update && apt-get install -y \
+    wget \
+    gnupg \
+    ca-certificates \
+    fonts-liberation \
+    libasound2 \
+    libatk-bridge2.0-0 \
+    libatk1.0-0 \
+    libatspi2.0-0 \
+    libcups2 \
+    libdbus-1-3 \
+    libdrm2 \
+    libgbm1 \
+    libgtk-3-0 \
+    libnspr4 \
+    libnss3 \
+    libwayland-client0 \
+    libxcomposite1 \
+    libxdamage1 \
+    libxfixes3 \
+    libxkbcommon0 \
+    libxrandr2 \
+    xdg-utils \
+    && rm -rf /var/lib/apt/lists/*
+
+# Set working directory
+WORKDIR /app
+
+# Copy application files
+COPY requirements.txt .
+COPY server.py .
+COPY fast_flights ./fast_flights
+
+# Install Python dependencies
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Install Playwright browsers
+RUN playwright install chromium
+
+# Set the entrypoint to run the server
+ENTRYPOINT ["python", "server.py"]