[BUG] fix docker don't shutdown gracefully (#1648)

## Description of changes
- Docker gracefully shutdown (#1646  )

bin/docker_entrypoint.sh

@@ -4,4 +4,4 @@ echo "Rebuilding hnsw to ensure architecture compatibility"
 pip install --force-reinstall --no-cache-dir chroma-hnswlib
 export IS_PERSISTENT=1
 export CHROMA_SERVER_NOFILE=65535
-uvicorn chromadb.app:app --workers 1 --host 0.0.0.0 --port 8000 --proxy-headers --log-config chromadb/log_config.yml --timeout-keep-alive 30
+exec uvicorn chromadb.app:app --workers 1 --host 0.0.0.0 --port 8000 --proxy-headers --log-config chromadb/log_config.yml --timeout-keep-alive 30