fix: структура как у BG — class-based, debug=True, Dockerfile, чистый requirements

Dockerfile

@@ -0,0 +1,12 @@
+FROM python:3.12-slim
+
+WORKDIR /app
+
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY site site
+
+EXPOSE 5000
+
+CMD ["python", "site/app.py"]