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>

start-ollama.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+export OLLAMA_NUM_GPU=999
+export no_proxy=localhost,127.0.0.1
+export ZES_ENABLE_SYSMAN=1
+# [optional] under most circumstances, the following environment variable may improve performance, but sometimes this may also cause performance degradation
+export SYCL_PI_LEVEL_ZERO_USE_IMMEDIATE_COMMANDLISTS=1
+
+# Use OLLAMA_HOST and OLLAMA_KEEP_ALIVE from environment (set via docker-compose),
+# falling back to sensible defaults if not set.
+export OLLAMA_HOST="${OLLAMA_HOST:-0.0.0.0:11434}"
+export OLLAMA_KEEP_ALIVE="${OLLAMA_KEEP_ALIVE:-24h}"
+
+# [optional] if you want to run on single GPU, use below command to limit GPU may improve performance
+# export ONEAPI_DEVICE_SELECTOR=level_zero:0
+# If you have more than one dGPUs, according to your configuration you can use configuration like below, it will use the first and second card.
+# export ONEAPI_DEVICE_SELECTOR="level_zero:0;level_zero:1"
+
+./ollama serve