docs: expand README — features table, GPU notes, smoke test

ollama/README.md

@@ -1,6 +1,8 @@
 # ollama-docker-compose
 
-Docker Compose setup for running [Ollama](https://ollama.com) (optionally with a web UI) locally.
+Minimal Docker Compose setup for running [Ollama](https://ollama.com) locally — exposes the API on `:11434` with a named volume so pulled models persist across restarts.
+
+> The "optionally with a web UI" phrase from the description is **not yet wired**. Open Web UI sidecar can be added — see [Roadmap](#roadmap).
 
 ## Quick start
 
@@ -8,12 +10,47 @@ Docker Compose setup for running [Ollama](https://ollama.com) (optionally with a
 docker compose up -d
 ```
 
-Ollama API at `http://localhost:11434`. Pull a model:
+Ollama API → `http://localhost:11434`.
+
+Pull a model:
 
 ```bash
 docker compose exec ollama ollama pull llama3.2
 ```
 
+Chat from CLI:
+
+```bash
+docker compose exec ollama ollama run llama3.2
+```
+
+Smoke test via API:
+
+```bash
+curl http://localhost:11434/api/generate -d '{
+  "model": "llama3.2",
+  "prompt": "Why is the sky blue?",
+  "stream": false
+}'
+```
+
+## What's inside
+
+| Field | Value |
+|---|---|
+| Image | `ollama/ollama` (latest) |
+| Port | `11434:11434` |
+| Volume | `ollama:/root/.ollama` (models, manifests) |
+| Restart policy | `unless-stopped` |
+
+## GPU
+
+To enable GPU, add `deploy.resources.reservations.devices` for the NVIDIA runtime — see the [Ollama Docker docs](https://hub.docker.com/r/ollama/ollama). CPU-only by default.
+
+## Roadmap
+
+- Add Open Web UI sidecar (`ghcr.io/open-webui/open-webui:main`) on `:3000` wired to this Ollama instance.
+
 ## License
 
 Apache-2.0