Fix ollama not reachable from host due to hardcoded OLLAMA_HOST in entrypoint

The IPEX-LLM bundled start-ollama.sh hardcodes OLLAMA_HOST=127.0.0.1 and
OLLAMA_KEEP_ALIVE=10m, overriding docker-compose environment variables and
preventing external connections through Docker port mapping.

- Add custom start-ollama.sh that honours env vars with sensible defaults
- Mount it read-only into the container
- Fix LD_LIBRARY_PATH env var syntax (: -> =)
- Add .gitignore for IDE/swap/webui data files
- Update CHANGELOG and README with fix documentation

Co-authored-by: Cursor <cursoragent@cursor.com>

CHANGELOG.md

@@ -2,6 +2,19 @@
 
 ## 2026-02-12
 
+### Fix: Ollama not reachable from host via Docker port mapping
+
+The bundled IPEX-LLM `/start-ollama.sh` entrypoint hardcodes
+`OLLAMA_HOST='127.0.0.1:11434'` and `OLLAMA_KEEP_ALIVE=10m`, overriding any
+values set through Docker Compose environment variables.
+
+- Added a custom `start-ollama.sh` that respects environment variables
+  (`${OLLAMA_HOST:-0.0.0.0:11434}`, `${OLLAMA_KEEP_ALIVE:-24h}`) instead of
+  hardcoding them
+- Mounted the script into the container as a read-only volume
+  (`./start-ollama.sh:/start-ollama.sh:ro`)
+- Fixed `LD_LIBRARY_PATH` env var syntax in docker-compose.yml (`:` -> `=`)
+
 ### Updated Intel GPU runtime stack to latest releases
 
 - **level-zero**: v1.22.4 -> v1.28.0