docs: add README

ollama/README.md

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+# ollama-docker-compose
+
+Docker Compose setup for running [Ollama](https://ollama.com) (optionally with a web UI) locally.
+
+## Quick start
+
+```bash
+docker compose up -d
+```
+
+Ollama API at `http://localhost:11434`. Pull a model:
+
+```bash
+docker compose exec ollama ollama pull llama3.2
+```
+
+## License
+
+Apache-2.0