Stephan Berbig b47a09db91 demo + playground + docs ...

One-command demo so the gateway can be exercised end-to-end without a GPU or a
real model download:

- demo/mock-ollama/ — tiny FastAPI service emulating Ollama (/api/tags,
  /api/chat + /api/generate NDJSON streaming with realistic prompt_eval_count
  and eval_count on the final frame, /api/embed, /api/show, /api/version).
  Non-root multi-stage Dockerfile, never published (internal network only).
- docker-compose.demo.yml — postgres + redis + mock-ollama + gateway, with
  PLAYGROUND_ENABLED=true and ./playground mounted read-only at /app/playground.
  Mirrors the prod posture (mock-ollama not exposed).
- demo.sh — brings the stack up, waits on /healthz, creates a demo tenant with
  allow_all_models and a fresh API key via the bootstrap CLI inside the
  container, then prints the key, the playground URL, and five ready-to-paste
  curl commands (SSE chat, NDJSON chat, /v1/models, a 401, a 403 /api/pull).
  ./demo.sh --down tears everything back down with volumes.
- playground/index.html — single-file dark-themed UI served same-origin by
  the gateway at /playground (CORS-free). Per-endpoint About card with method/
  auth/streaming badges, a real description, sample request body, sample
  response, and a footer note. Live SSE/NDJSON rendering of the response.
  A live, copyable curl box that mirrors exactly what Run sends. Run + Refresh
  are visibly gated until an API key is in the field; the Base URL is
  force-pinned to location.origin three times to defeat browser autofill.
- docs/ — API.md (full endpoint reference with curl, streaming formats, error
  model, SPEC §6.5 response headers), ARCHITECTURE.md (incl. §4.6 discovery
  + the request lifecycle), DEPLOYMENT.md (Ollama-never-exposed rule,
  pointing at a real Ollama backend, env reference), THREAT_MODEL.md
  (SPEC §3 table + the allow_all_models opt-in notes), OPERATIONS.md
  (key/budget/model/usage runbook + fail-closed table), PLAYGROUND.md.
  mkdocs.yml (Material theme) wires them together.

2026-05-26 20:52:33 +02:00

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