🔧 Deploying a Containerized Backend to a VPS with Docker Compose + GitHub Actions (A Beginner's Runbook)

This is a complete, copy‑pasteable guide for shipping a backend app to a single Linux server using Docker Compose, with a GitHub Actions pipeline that builds the image, scans it, and deploys it over SSH.

It is written to be language- and framework-agnostic. The examples use a Node/TypeScript API with PostgreSQL, Redis, and a background worker,...