add: stand configs

PROD_STAND/POSTGRES/testflask/Dockerfile

@@ -0,0 +1,14 @@
+# Базовый образ Python для Flask-приложения.
+FROM python:3.9-slim
+
+WORKDIR /app
+
+COPY requirements.txt .
+
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY site /app/site
+
+EXPOSE 5000
+
+CMD ["python", "site/app.py"]