Update Dockerfile

Dockerfile

@@ -45,6 +45,8 @@ FROM python:3.11.5
 RUN apt update
 WORKDIR /app
 
+RUN  ls -l / || ls -l /lib || ls -l /usr || ls -l /usr/lib6 || echo "### An ls failed."
+
 COPY ./requirements.txt /app/requirements.txt
 COPY ./semsearch.py     /app/semsearch.py
 COPY ./startup.sh       /app/startup.sh