Add Docker support and update requirements

Dockerfile

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+FROM python:3.12-slim
+
+WORKDIR /app
+
+# Системные зависимости: шрифты и библиотеки для Pillow/reportlab
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    gcc \
+    libjpeg-dev \
+    zlib1g-dev \
+    libfreetype6-dev \
+    libpng-dev \
+    libffi-dev \
+    libxml2-dev \
+    libxslt1-dev \
+    fonts-dejavu-core \
+    fonts-liberation \
+    && rm -rf /var/lib/apt/lists/*
+
+# Зависимости Python
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Копируем код приложения
+COPY . .
+
+# Порт, который слушает Waitress
+EXPOSE 8888
+
+CMD ["python", "run_waitress.py"]