Hello from hello-world

What is this?

hello-world is the gyrum fleet's multi-tenancy proof deployment. It exists to prove one architectural decision: that a host and the projects it runs are cleanly separated things — the host owns Docker, the shared Caddy edge, TLS, and security tooling; a project is just two container images and a hostname. The only thing that crosses the boundary is the triple (hostname, upstream_container, upstream_port).

Concretely, this site demonstrated that a second project can run beside the fleet's main workload on the same server with no shared state, no port collisions, and no downtime for its neighbour when this project deploys — exercising the per-project edge snippet, the registry image-pull contract, and the shared deploy pipeline end to end for a project that is not the main one.

The service does the smallest thing that proves the path: /healthz (the deploy gate), /api/version (build identity, shown above), and /api/hello?name=… (a round-trip through the shared edge proxy).

Decision record: ADR-092 — “Host/Project separation: two images per project, host owns edge” (accepted 2026-04-25, fleet architecture decisions, 092-host-project-separation.md). Kept deliberately alive as living documentation of that cut.