klarlack image: switch to debian bookworm, use klarlack 20240104

container/Dockerfile.klarlack

-FROM ubuntu:bionic-20230530
-ENV VERSION=20231002+bionic
+FROM debian:bookworm-20240110
+ENV VERSION=20240104+bookworm
 
 RUN apt-get update && \
 	apt-get upgrade -y && \
 	apt-get install -y curl gnupg
 
 # add uplex repository and import gpg key
-RUN echo "deb https://pkg.uplex.de/dpkg bionic innovation" | tee -a /etc/apt/sources.list
+RUN echo "deb https://pkg.uplex.de/dpkg bookworm klarlack" | tee -a /etc/apt/sources.list
 RUN curl -L https://pkg.uplex.de/dpkg/uplex-varnish.gpg.key | apt-key add -
 RUN apt-get clean && \
 	apt-get update