Refactor Dockerfile: override base image entrypoint and start script for improved execution control

Dockerfile

@@ -46,5 +46,6 @@ EXPOSE 11434
 # Switch to non-root user
 USER appuser
 
-# Start both Ollama and FastAPI
-CMD ["/app/start.sh"]
+# Override the base image entrypoint and start our script
+ENTRYPOINT []
+CMD ["bash", "/app/start.sh"]