Python Chapter — Deployment Patterns

 Flask + venv + systemd + Nginx

A minimal, production-grade Python service pattern for on-prem or containerized environments.

Purpose:
To deploy Flask applications securely and repeatably using:

• venv for isolated Python environments
• systemd for process control and auto-restart
• Nginx as a reverse proxy and TLS terminator

Why here:
It’s a Pythonic deployment pattern — the focus is on how the Flask app integrates with OS-level and web-server layers.
Nginx and systemd serve as infrastructure tools, but they’re subordinate to the Python app lifecycle.