R.001 / TechnologyINFRASTRUCTURE
§ Tech.00
Coolify — Deployment and hosting
Self-hosted PaaS running on any VPS. One-click deployments for Docker containers, Next.js apps, databases, and any Git repository. A single Hetzner CX31 (8 vCPU, 16 GB RAM, ~€20/mo) runs the entire STACKD stack for most SMB clients.
Coolify v4
open-source
Hetzner CX31
8 vCPU / 16 GB ~€20/mo
Git-push deploy
zero-downtime
§ Tech.01Replaces
What it replaces
| Provider | Equivalent spec | Monthly cost |
|---|---|---|
| Hetzner (recommended) | CX31: 8vCPU/16GB | €18–22/mo |
| DigitalOcean | 4vCPU/8GB | $48/mo |
| Vultr | 4vCPU/16GB | $48/mo |
| AWS EC2 | t3.xlarge equivalent | £150+/mo |
One Hetzner box runs Next.js, Payload, n8n, Frappe, Chatwoot, Typebot, Mixpost, and Postgres — all with their own subdomains and auto-SSL.
§ Tech.02Pipeline
How STACKD uses it
- Manages domains, SSL (via Caddy), environment variables, health checks, and auto-restarts for every service
- Staging and production environments per client — git-push triggers a rebuild with zero downtime
- Infrastructure maintenance is part of STACKD's retainer offering — Coolify had CVEs in late 2025, patched promptly
§ Tech.03Business case
Business outcomes
All industries
Full client stack (8 services) on one Hetzner box — each with its own subdomain and auto-SSL
Infrastructure cost ~€20/mo vs £150+/mo on AWS
All industries
Staging and production environments per client — identical infrastructure, separate data
Zero staging-to-production surprises
All industries
Git-push → auto-rebuild → zero-downtime deploy for every service in the stack
Deploy frequency up — no manual SSH required
§ Tech.04Systems