Try different method to change from dash to bash in Docker

.docker/Dockerfile

 FROM debian:bookworm
 
 # change to bash default for gitlab runner
-RUN echo "dash dash/sh boolean false" | debconf-set-selections
-RUN DEBIAN_FRONTEND=noninteractive dpkg-reconfigure dash
+RUN unlink /bin/sh
+RUN ln -s /bin/bash /bin/sh
 
 RUN apt-get update
 RUN apt-get install -y cmake