Docker

Today I built an infrastructure that lets me deploy any site or webapp to a subdomain in a few commands, with automatic SSL. Here’s how it works. 🎯 The goal To be able to do: ./deploy.sh my-app nginx:alpine # → https://my-app.example.com (SSL included, ready in seconds) Without having to: Manually configure DNS Manage SSL certificates Expose host ports Write complex nginx configs 🏗️ High-level architecture ┌─────────────────────────────────────────────────────────────────┐ │ CLOUDFLARE │ │ ┌─────────────────────────────────────────────────────────┐ │ │ │ Zone: example.com │ │ │ │ *.example.com → A record → Server IP │ │ │ └─────────────────────────────────────────────────────────┘ │ └─────────────────────────────────────────────────────────────────┘ │ ▼ :80/:443 ┌─────────────────────────────────────────────────────────────────┐ │ SERVER │ │ ┌─────────────────────────────────────────────────────────┐ │ │ │ CADDY │ │ │ │ - Reverse proxy │ │ │ │ - Auto-SSL via Let's Encrypt (DNS challenge) │ │ │ │ - Wildcard certificate *.example.com │ │ │ │ - Dynamic routing to containers │ │ │ └─────────────────────────────────────────────────────────┘ │ │ │ │ │ │ │ ▼ ▼ ▼ │ │ ┌─────────────┐ ┌─────────────┐ ┌─────────────┐ │ │ │ Container │ │ Container │ │ Container │ │ │ │ app-a │ │ app-b │ │ app-c │ │ │ └─────────────┘ └─────────────┘ └─────────────┘ │ │ │ │ Network: apps-network (bridge) │ └─────────────────────────────────────────────────────────────────┘ 🔧 Components 1. Cloudflare DNS + wildcard The first step is to create a wildcard DNS record: ...